BASIC C PROGRAMS

1.Write a program to print a string in C language
#include<stdio.h>
#include<conio.h>
main()
{
clrscr();
printf("\nKodeGod.com");
getch();
}

2.Write a program to accept values of two numbers and print their addition
#include<stdio.h>
#include<conio.h>
main()
{
int a,b,c;
clrscr();
printf("Enter number 1: ");
scanf("%d",&a);
printf("Enter number 2: ");
scanf("%d",&b);
c=a+b;
printf("Addition is : %d",c);
getch();
}

3.Write a program to accept values of two numbers and print their subtraction
 #include<stdio.h>
#include<conio.h>
main()
{
int a,b,c;
clrscr();
printf("Enter number 1: ");
scanf("%d",&a);
printf("Enter number 2: ");
scanf("%d",&b);
c=a-b;
printf("Subtraction : %d",c);
getch();
}

4.Write a program to accept values of two numbers and print their multiplication in C language
#include<stdio.h>
#include<conio.h>
main()
{
int a,b,c;
clrscr();
printf("Enter number 1: ");
scanf("%d",&a);
printf("Enter number 2: ");
scanf("%d",&b);
c=a*b;
printf("Multiplication: %d",c);
getch();
}

5.Write a program to accept values of two numbers and print their division in C language
#include<stdio.h>
#include<conio.h>
main()
{
float a,b,c;
clrscr();
printf("Enter number 1: ");
scanf("%f",&a);
printf("Enter number 2: ");
scanf("%f",&b);
c=a/b;
printf("Division is : %f",c);
getch();
}

6.Write a program to print area of a circle. A(circle)= 3.142 * R * R in C language
 #include<stdio.h>
#include<conio.h>
main()
{
float AREA,R;
clrscr();
printf("Enter Radius: ");
scanf("%f",&R);
AREA=3.14*R*R;
printf("Area of the given is : %6.2f",AREA);
getch();
}

7.Write a program to print area of a triangle A(Triangle)= 0.5 * B * H in C language
 #include<stdio.h>
#include<conio.h>
main()
{
float AREA,B,H;
clrscr();
printf("Enter Base & Height: ");
scanf("%f%f",&B,&H);
AREA=0.5*B*H;
printf("Area of the given is : %6.2f",AREA);
getch();
}

8.Write a program to print simple interest SI = (PNR)/100 in C language
#include<stdio.h>
#include<conio.h>
main()
{
float SI,P,N,R;
clrscr();
printf("Enter Radius: ");
scanf("%f%f%f",&P,&N,&R);
SI=(P*N*R)/100;
printf("Area of the given is : %6.2f",SI);
getch();
}

9.Write a program to accept a number from user and print it’s square & cube in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,Square,Cube;
clrscr();
printf("Enter Number: ");
scanf("%d",&n);
Square=n*n;
Cube=n*n*n;
printf("\nSquare: %d\nCube: %d",Square,Cube);
getch();
}

10.Write a program to accept two values a & b and interchange their values in C language
#include<stdio.h>
#include<conio.h>
main()
{
int a,b,temp;
clrscr();
printf("Enter Numbers: ");
scanf("%d%d",&a,&b);
printf("\nBefore Swapping..\na=%d,b=%d",a,b);
temp=a;
a=b;
b=temp;
printf("\nAfter Swapping..\na=%d,b=%d",a,b);
getch();
}

11.Write a program to accept roll no and marks of 3 subjects of a student, Calculate total of 3 subjects and average in C language
#include<stdio.h>
#include<conio.h>
main()
{
int roll_no,m1,m2,m3,total;
float average;
clrscr();
printf("Enter roll number : ");
scanf("%d",&roll_no);
printf("Enter marks 1 : ");
scanf("%d",&m1);
printf("Enter marks 2 : ");
scanf("%d",&m2);
printf("Enter marks 3 : ");
scanf("%d",&m3);
total=m1+m2+m3;
average=total/3.0;
printf("\nStudent Roll Number : %d",roll_no);
printf("\nMarks 1 : %d",m1);
printf("\nMarks 2 : %d",m2);
printf("\nMarks 3 : %d",m3);
printf("\nTotal : %d ",total);
printf("\nAverage : %f ",average);
getch();
}

12.Print the following output in C Language
#include<stdio.h>
#include<conio.h>
main()
{
clrscr();
printf("\n");
printf(" /\\ \n");
printf(" //\\\\ \n");
printf(" ///\\\\\\ \n");
printf("////\\\\\\\\ \n");
printf(" ||| \n");
printf(" ||| \n");
getch();
}

13.Write a program to accept two number and print largest among them in C language
 #include<stdio.h>
 #include<conio.h>
 main()
 {
 int a,b;
 clrscr();

printf("Enter numbers : ");

scanf("%d%d",&a,&b);

if(a>b)
 printf("Largest value is….%d",a);
 else
 printf("Largest value is….%d",b);
 getch();
 }

14.Write a program to accept a number and print if the number is Positive/Negative in C language
#include<stdio.h>
#include<conio.h>
 main()
{
int n;
clrscr();
printf("Enter number..");
scanf("%d",&n);
if(n>0)
printf("Given number is positive");
else if(n<0)
printf("Given number is negative");
else
printf("Number is Zero");
getch();
}

15.Write a program to accept a number and check if it is >10, <10 or =10 in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n;
clrscr();
printf("enter number…");
scanf("%d",&n);
if(n>10)
printf("Number is greater than 10");
else if(n<10)
printf("Number is lesser than 10");
else
printf("Number is 10");
getch();
}

16.Write a program to accept a number from user and print if it is even or odd in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
if(n%2==0)
printf("Number is even…");
else
printf("Number is odd….");
getch();
}

17.Write a program to accept a number from user and print if it is divisible by 5 in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
if(n%5==0)
printf("Number is divisible by 5.");
else
printf("Number is not divisible by 5.");
getch();
}

18.Write a program to accept a number from user and print if it is multiple of 7 in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
if(n%7==0)
printf("Number is multiple of 7");
else
printf("Number is not multiple of 7");
getch();
}

19.Write a program to accept two numbers from user and compare them in C language
#include<stdio.h>
#include<conio.h>
main()
{
int a,b;
clrscr();
printf("Enter numbers…");
scanf("%d%d",&a,&b);
if(a>b)
printf("a is greater than b");
else if(b>a)
printf("b is greater tha b");
else
printf("a and b are equal");
getch();
}

20.Write a program to accept three numbers from user and print them in ascending and decending order in C language
#include<stdio.h>
#include<conio.h>
main()
{
int a,b,c;
clrscr();
printf("Enter numbers…");
scanf("%d%d%d",&a,&b,&c);
if((a>=b)&&(a>=c))
{
if(b>=c)
{
printf("\n Descending order : %d %d %d",a,b,c);
printf("\n Ascending order : %d %d %d",c,b,a);
}
else
{
printf("\n Descending order : %d %d %d",a,c,b);
printf("\n Ascending order : %d %d %d",b,c,a);
}
}
else if((b>=a)&&(b>=c))
{
if(a>=c)
{
printf("\n Descending order : %d %d %d",b,a,c);
}
}
getch();
}

21.write a program to calculate roots of a quadratic equations in C language x=b^2-4ac
if x=0 -> only one root ,
if x>0 -> roots are distinct (–b+x)/2a & (–b-x)/2a
if x roots are imaginary
#include<stdio.h>
#include<conio.h>
main()
{
float x,r1,r2,a,b,c;
clrscr();
printf("Enter a,b,c…");
scanf("%f%f%f",&a,&b,&c);
x=b*b-4*a*c;
r1=(-b+x)/2*a;
r2=(-b-x)/2*a;
if(x>0)
printf("\nRoots are unequal…\n");
else if(x<0)
printf("\nRoots are imaginary…\n");
else
printf("\nRoots are same….\n");
printf("R1 = %f",r1);
printf("R2 = %f",r2);
getch();
}

22.Write a program to accept roll number ,and marks for three subjects, print total marks and average, also print grade by considering following
 conditions Avg>=60 Grade A
Avg=50 Grade B
Avg=40 Grade C
Grade F.
#include<stdio.h>
#include<conio.h>
main()
{
int RollNumber,m1,m2,m3,total;
float avg;
clrscr();
printf("Enter Roll Number : ");
scanf("%d",&RollNumber);
printf("Enter marks for three subjects : ");
scanf("%d%d%d",&m1,&m2,&m3);
total=m1+m2+m3;
avg=total/3.0;
printf("\nTotal is……. %d",total);
printf("\nAverage is….. %5.2f %",avg);
if(avg>=60)
printf("\nGrade : A");
else if((avg>=50)&&(avg<60))
printf("\nGrade : B");
else if((avg>=40)&&(avg<50))
printf("\nGrade : C");
else
printf("\nGrade : F");
getch();
}

23.Write a Program to accept age, gender, and marital status of a driver and print if he/she is insured considering following conditions If driver is married then he/she is insured, else not If he/she is not married, if male & age>=30 then insured else not If he/she is not married, if female & age>=25 then insured else not.
#include<stdio.h>
#include<conio.h>
main()
{
int age;
char MaritalStatus,Gender;
clrscr();
printf("Enter MaritalStatus, Gender, Age : (e.g. m,f,25) : ");
scanf("%c,%c,%d",&MaritalStatus,&Gender,&age);
if(MaritalStatus==’m’)
{
printf("Driver is Insured !!!");
}
else if(MaritalStatus==’u’)
{
if(Gender==’m’)
{
if(age>=30)
printf("Insured !!!");
else
printf("Not Insured !!!");
}
else if(Gender==’f’)
{
if(age>=18)
printf("Insured !!!");
else
printf("Not Insured !!!");
}
else
…............

24.Write a Program to print numbers 1 to n using while loop in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=1,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(i<=n)
{
printf("%d\t",i);
i++;
}
getch();
}

25.Write a Program to print numbers n to 1 using Do While loop in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=1,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
i=n;
do
{
printf("%d\t",i);
i–;
}while(i>=1);
getch();
}

26.Write a Program to print first n even numbers in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=2,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(i<=n)
{
printf("%d\t",i);
i=i+2;
}
getch();
}

27.Write a Program to print first n odd numbers in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=1,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(i<=n)
{
printf("%d\t",i);
i=i+2;
}
getch();
}

28.Write a Program to accept a number and print the number in reverse order. E.g. if 1324 is the number then the output will be 4231 in C language
#include<stdio.h>
#include<conio.h>
main()
{
int rem,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(n>0)
{
rem=n%10;
printf("%d",rem);
n=n/10;
}
getch();
}

29.Write a Program to accept a number and print sum of it’s digits in C language
#include<stdio.h>
#include<conio.h>
main()
{
int rem,sum=0,n
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(n>0)
{
rem=n%10;
sum=sum+rem;
n=n/10;
}
printf("Sum of digits….%d",sum);
getch();
}

30.Write a program to accept a number from user and check it it is Armstrong number or not i.e. 153 = 1^3 + 5^3 + 3^3 = 153 in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=2,temp,rem,sum=0 ,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
temp=n;
while(n>0)
{
rem=n%10;
sum=sum+rem*rem*rem;
n=n/10;
}
if(temp==sum)
printf("Armstrong Number");
else
printf("Not an Armstrong Number");
getch();
}

31.Write a program to print table of a given number n in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=10;i++)
printf("%d X %d = %d\n",n,i,n*i);
getch();
}

32.Write a program to print sum of given first n numbers in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,newn,i,sum=0;
clrscr();
printf("enter number : ");
scanf("%d",&n);
printf("Numbers entered….\n");
for(i=1;i<=n;i++)
{
scanf("%d",&newn);
sum=sum+newn;
}
printf("Sum of given n digits is… %d",sum);
}

33.Write a program to print following outputs in C language
****
****
****
****
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
printf("*");
}
printf("\n");
}
getch();
}

34.Write a program to print following outputs in C language *
**
***
****
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf("*");
}
printf("\n");
}
getch();
}

35.Write a program to print following outputs in C language 
****
***
**
*
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=n;i>=1;i–)
{
for(j=1;j<=i;j++)
{
printf("*");
}
printf("\n");
}
getch();
}

36.Write a program to print following outputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(k=1;k<i;k++)
{
printf(" ");
}
for(j=i;j<=n;j++)
{
printf("*");
}
printf("\n");
}
getch();
}

37.Write a program to print following outputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=n;i>=1;i–)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("*");
}
printf("\n");
}
getch();
}

38.Write a program to print following outputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("*");
}
for(j=2;j<=i;j++)
{
printf("*");
}

printf("\n");
}
getch();
}

39.Write a program to print following outputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=n;i>=1;i–)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("*");
}
for(j=2;j<=i;j++)
{
printf("*");
}

printf("\n");
}
getch();
}

40.Write a program to print following outputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);

for(i=1;i<=n;i++)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("*");
}
for(j=2;j<=i;j++)
{
printf("*");
}

printf("\n");
}

for(i=n-1;i>=1;i–)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("*");
}
for(j=2;j<=i;j++)
{
printf("*");
}

printf("\n");
}
getch();
}

41.Write a program to print following outputs in C language 1
12
123
1234
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
printf("%d",j);
printf("\n");
}
getch();
}

42.Write a program to print following outputs in C language 1
22
333
4444
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
printf("%d",i);
printf("\n");
}
getch();
}

43.Write a program to print following outputs in C language
A
BBB
CCCCC
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,k,n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
//ASCII Code for ‘A’ is 65
for(i=1;i<=n;i++)
{
for(k=1;k<=(n-i);k++)
{
printf(" ");
}
for(j=1;j<=i;j++)
{
printf("%c",64+i);
}
for(j=2;j<=i;j++)
{
printf("%c",64+i);
}

printf("\n");
}
getch();
}

44.Write a program to print following outputs in C language
ABCDEEBCBA
ABCD BCBA
ABC CBA
AB BA
A A

#include<stdio.h>
#include<conio.h>
main()
{
int i,n,j,k;
clrscr();
printf("Enter number……..");
scanf("%d",&n);
for(i=n-1;i>=0;i–)
{
for(j=0;j<=i;j++)
printf("%c",65+j);
for(k=1;k<(n-i);k++)
printf(" ");
for(j=i;j>=0;j–)
printf("%c",65+j);
printf("\n");
}
getch();
}

45.Write a program to print following outputs in C language
1
11
121
1231
12341

#include<stdio.h>
#include<conio.h>
main()
{
int i,j,n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
for(i=0;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf("%d",j);
}
printf("1\n");
}
getch();
}

46.Write a program to accept a number from user and print it’s factorial in C language Eg: factorial of 5 is:-
5! = 5 * 4 * 3 * 2 * 1=120
#include<stdio.h>
#include<conio.h>
main()
{
int i,fact=1,n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
for(i=1;i<=n;i++)
fact=fact*i;
printf("facttorialof the given number is…%d",fact);
getch();

}

47.Write a program to accept a number from user and print if it is prime or not in C language
#include<conio.h>
#include<process.h>
main()
{
int i,n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
for(i=2;i<=n/2;i++)
{
if(n%i==0)
{
printf("Not Prime");
getch();
exit(0);
}
}
printf("Prime ");
getch();
}

48.Write a program to accept a number and print prime numbers between 2 and n in C language
 #include<stdio.h>
#include<conio.h>
#include<process.h>
main()
{
int i,flag=1,n,newn;
clrscr();
printf("Enter number…");
scanf("%d",&n);
for(newn=2;newn<=n;newn++)
{
flag=1;
for(i=2;i<=newn/2 ;i++)
{
if(newn%i==0)
{
flag=0;
break;
}
}
if(flag==1)
printf("%d ",newn);
}
getch();
}

49.Write a program to accept a number and print fibonacci series upto that level in C language
#include<stdio.h>
#include<conio.h>
main()
{
int pre=1,cur=1,temp,i,n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
printf("%d\t%d",pre,cur);
for(i=3;i<=n;i++)
{
temp=cur;
cur=pre+cur;
pre=temp;
printf("\t%d",cur);
}
getch();
}

50.Write a program to print digits, alphabets in capital and lower case in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i;
clrscr();
for(i=65;i<=90;i++)
printf("%c ",i);

printf("\n\n\n\n");
for(i=97;i<=122;i++)
printf("%c ",i);

printf("\n\n\n\n");
for(i=48;i<=57;i++)
printf("%c\t",i);

getch();
}

51.Write a program to accept a number n from user and Add n terms of the series in C language 1/2! + 2/3! + 3/4! + 4/5! + 5/6! + ………
 #include<stdio.h>
#include<conio.h>
main()
{
int i,j,n;
float sum=0,fact=1;
clrscr();
printf("Enter number….");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
fact=1;
for(j=1;j<=i+1;j++)
fact=fact*j;
sum=sum+i/fact;
}
printf("Sum of the series….%f",sum);
getch();
}

52.Write a program to read n numbers (Xi) from the user and print out their average and standard deviation. Formulae are Average = (Sum of Xi)/n ,
Standard Deviation= Sum of (Xi *Xi)/(n*n)
 #include<stdio.h>
#include<conio.h>
main()
{
int n,i,newn,sum_avg=0,sum_sd=0;
float sd,avg;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("Enter numbers…");
for(i=1;i<=n;i++)
{
scanf("%d",&newn);
sum_avg=sum_avg+newn;
sum_sd=sum_sd+(newn*newn);
}
avg=sum_avg/(float)n; //Type casting.
sd=sum_sd/(float)(n*n);//Type casting
printf("\nAverage = %f",avg);
printf("\nStandard Deviation = %f",sd);
getch();
}

53.Write a program to print out ASCII chart on a single screen (all 256 characters from 0 to 255) in a tabular form. The ASCII code should be followed by the corresponding character in C language
 #include<stdio.h>
#include<conio.h>
main()
{
int i;
clrscr();
for(i=0;i<=255;i++)
printf("%d-%c\t",i,i);
getch();
}

54.Write a program to accept a single value interger from user and print that integer in words in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,rem;
clrscr();
printf("Enter number…");
scanf("%1d",&n); //%1d to scan single integer
switch(n)
{
case 0 : printf("Zerro ");break;
case 1 : printf("One ");break;
case 2 : printf("Two ");break;
case 3 : printf("Three ");break;
case 4 : printf("Four ");break;
case 5 : printf("Five ");break;
case 6 : printf("Six ");break;
case 7 : printf("Seven ");break;
case 8 : printf("Eigth ");break;
case 9 : printf("Nine ");break;
}
getch();
}

55.Write a program to print following output
#include<stdio.h>
#include<conio.h>
main()
{
int i,j;
clrscr();
printf("+");
for(i=2;i<=79;i++)
printf("-");
printf("+");
for(i=2;i<=24;i++)
{
printf("|");
for(j=2;j<=79;j++)
printf(" ");
printf("|");
}
printf("+");
for(i=2;i<=79;i++)
printf("-");
printf("+");

getch();
}

56.Write a program to accept a number from user and print that number in words but in reverse order in C language E.g. 153 -> THREE FIVE ONE
#include<stdio.h>
#include<conio.h>
main()
{
int n,rem;
clrscr();
printf("Enter number…");
scanf("%d",&n);
while(n>0)
{
rem=n%10;
switch(rem)
{
case 0 : printf("Zerro ");break;
case 1 : printf("One ");break;
case 2 : printf("Two ");break;
case 3 : printf("Three ");break;
case 4 : printf("Four ");break;
case 5 : printf("Five ");break;
case 6 : printf("Six ");break;
case 7 : printf("Seven ");break;
case 8 : printf("Eigth ");break;
case 9 : printf("Nine ");break;
}
n=n/10;

}
getch();
}

57.Write a Program to accept two numbers and a operator (+, -, *, / from user and complete that particular operation only in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,rem,a,b;
char op;
clrscr();
printf("Enter Operator(+,-,*,/)…");
scanf("%c",&op);
printf("Enter numbers…");
scanf("%d%d",&a,&b);
switch(op)
{
case ‘+’ : printf("Result : %d ",a+b);break;
case ‘-‘ : printf("Result : %d ",a-b);break;
case ‘*’ : printf("Result : %d ",a*b);break;
case ‘/’ : printf("Result : %d ",a/b);break;
default : printf("Invalid operator….");
}
getch();
}

58.Write a program to accept a number n from user and then accept n array elements from user and reprint them in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20];
clrscr();
printf("Enter number…");
scanf("%d",&n);
printf("Enter array elements :\n" );
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}
for(i=0;i<n;i++)
printf("\nElement %d : %d",i+1,a[i]);
getch();
}

59.Write a program to accept a number n from user and then accept n array elements from user and reprint them in reverse order of inputs in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20];
clrscr();
printf("Enter number…");
scanf("%d",&n);
printf("Enter array elements :\n" );
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}
for(i=n-1;i>=0;i–)
printf("\nElement %d : %d",i+1,a[i]);
getch();
}

60.Write a program to accept a number n from user and then accept n array elements from user and print addition of those n array elements in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20],sum=0;
clrscr();
printf("Enter number…");
scanf("%d",&n);
printf("Enter array elements :\n" );
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}

for(i=0;i<n;i++)
sum=sum+a[i];
printf("\nSum of given array elements is : %d",sum);
getch();
}

61.Write a program to accept a number n from user and print fibbonacci series up to nth level using arrays in C language
#include<stdio.h>
#include<conio.h>
main()
{
int a[20],n,i;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
a[1]=a[2]=1;

for(i=3;i<=n;i++)
a[i]=a[i-1]+a[i-2];

for(i=1;i<=n;i++)
printf(" %d",a[i]);

getch();
}

62.Write a program to accept a number n from user and then accept n array elements from user and print maximum and minimum array element from that set of array in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20],max,min;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("Enter array elements…\n");
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}
max=min=a[0];
for(i=0;i<n;i++)
{
if(a[i]>max)
max=a[i];
if(a[i]<min)
min=a[i];
}
printf("\nMin : %d",min);
printf("\nMax : %d",max);
getch();
}

63.Write a program to accept a number n from user and then accept n array elements from user, print positive & Negative numbers separately in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20];
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("Enter array elements…\n");
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}

printf("\n\nNegative Elements : \n");
for(i=0;i<n;i++)
if(a[i]<0)
printf("\n%d",a[i]);

printf("\n\nPositive Elements : \n");
for(i=0;i<n;i++)
if(a[i]>0)
printf("\n%d",a[i]);

getch();
}

64.Write a program to accept a number n from user and then accept n array elements from user, print these array elements in ascending and descending order in C language
#include<stdio.h>
#include<conio.h>
main()
{
int n,i,a[20],j,max,min,temp;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("Enter array elements…\n");
for(i=0;i<n;i++)
{
printf("Enter element %d : ",i+1);
scanf("%d",&a[i]);
}
max=a[0];
for(i=0;i<n;i++)
{
for(j=0;j<i;j++)
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
printf("Ascending order…..\n");
for(i=0;i<n;i++)
{
printf(" %d ",a[i]);
}

min=a[0];
for(i=0;i<n;i++)
{
for(j=0;j<i;j++)
if(a[i]<a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
printf("\nDescending order….\n");
for(i=0;i<n;i++)
{
printf(" %d ",a[i]);
}

getch();
}

65.Write a program to accept a mXn matrix and reprint it in matrix form in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,n,a[5][5];
clrscr();
printf("Enter order of matrix :\n");
scanf("%d%d",&m,&n);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%d ",a[i][j]);
printf("\n");
}
getch();
}

66.Write a program to accept two mXn matrices and add them in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,n,a[5][5],b[5][5],c[5][5];
clrscr();
printf("Enter order of matrix :\n");
scanf("%d%d",&m,&n);
printf("Enter matrix elements of first matrix…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);

printf("Enter matrix elements of second matrix…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&b[i][j]);

for(i=0;i<m;i++)
for(j=0;j<n;j++)
c[i][j]=a[i][j]+b[i][j];

printf("Resultant matrix …..\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%d ",c[i][j]);
printf("\n");
}
getch();
}

67.Write a program to accept a mXn matrix and print addition of their array elements in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,n,a[5][5],sum=0;
clrscr();
printf("Enter order of matrix :\n");
scanf("%d%d",&m,&n);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
for(j=0;j<n;j++)
sum=sum+a[i][j];

printf("\nSum of matrix elements…..%d",sum);
getch();
}

68.Write a program to accept a nXn matrix and print addition of digonal elements of that matrix in C language
 #include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,a[5][5],sum=0;
clrscr();
printf("Enter order of matrix :\n");
scanf("%d",&m);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<m;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
for(j=0;j<m;j++)
if(i==j)
sum=sum+a[i][j];

printf("\nSum of diagonal elements…..%d",sum);
getch();
}

69.Write a program to accept a N x N matrix and print addition of upper triangular matrix elements in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,a[5][5],sum=0;
clrscr();
printf("Enter order of matrix :\n");
scanf("%d",&m);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<m;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
for(j=0;j<m;j++)
if(i<j)
sum=sum+a[i][j];

printf("\nSum of upper triangular elements…..%d",sum);
getch();
}

70.Write a program to accept a N x N matrix and print addition of lower triangular matrix elements in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,a[5][5],sum=0;
clrscr();
printf("Enter order of matrix :\n");
scanf("%d",&m);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<m;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
for(j=0;j<m;j++)
if(i>j)
sum=sum+a[i][j];

printf("\nSum of lower triangular elements…..%d",sum);
getch();
}

71.Write a program to accept two m X n matices and print their addition and multiplication in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,n,k,a[5][5],b[5][5],c[5][5];
clrscr();
printf("Enter order of matrix :\n");
scanf("%d%d",&m,&n);
printf("Enter matrix elements of first matrix…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);

printf("Enter matrix elements of second matrix…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&b[i][j]);

for(i=0;i<m;i++)
for(j=0;j<n;j++)
{
c[i][j]=0;
for(k=0;k<n;k++)
c[i][j]=c[i][j]+a[i][k]*b[k][j];
}

printf("Resultant matrix …..\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%d ",c[i][j]);
printf("\n");
}
getch();
}

72.Write a program to accept a m X n matrix and print it’s transpose matrix in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,m,n,a[5][5];
clrscr();
printf("Enter order of matrix :\n");
scanf("%d%d",&m,&n);
printf("Enter matrix elements…..\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);

for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%d ",a[j][i]);
printf("\n");
}
getch();
}

73.Write a program to accept two numbers from user and print it’s addition,subtraction,multiplication,division using different functions in C language
 #include<stdio.h>
#include<conio.h>

int add(int x,int y)
{
return(x+y);
}

int sub(int x,int y)
{
return(x-y);
}

int mul(int x,int y)
{
return(x*y);
}

int div(int x,int y)
{
return(x/y);
}

main()
{
int a,b;
clrscr();
printf("Enter numbers : \n");
scanf("%d%d",&a,&b);
printf("\nAddition : %d\n",add(a,b));
printf("\nSubtraction : %d\n",sub(a,b));
printf("\nMultiplication : %d\n",mul(a,b));
printf("\nDivision : %d\n",div(a,b));
getch();
}

75.Write a program to accept a number from user and print it’s factorial, check if it prime or not , and print it’s fibbonacci series using different functions in C language
 #include<stdio.h>
#include<conio.h>
 fact(int x)
{
int i,fact=1;
for(i=1;i<=x;i++)
fact=fact*i;
printf("Factorial is : %d",fact);
}

IsPrime(int x)
{
int i;
for(i=2;i<x-1;i++)
{
if(x%i==0)
{
printf("\nNot a Prime Number\n");
return 0;
}
}
printf("\nIt is a Prime number\n");
}

fibbo(int x)
{
int pre=1,cur=1,i,temp;
printf("%d %d",pre,cur);
for(i=3;i<=x;i++)
{
temp=cur;
cur=pre+cur;
pre=temp;
printf(" %d",cur);
}
}
main()
{
int n;
clrscr();
printf("Enter number…");
scanf("%d",&n);
fact(n);
IsPrime(n);
fibbo(n);
getch();
}

76.Write a program to calculate square and cube of a given number in C language
 #include<stdio.h>
#include<conio.h>
 int square(int x)
{
return(x*x);
}

int qube(int x)
{
return(x*x*x);
}
main()
{
int n;
clrscr();
printf("Enter number…..");
scanf("%d",&n);
printf("\nSquare : %d\n",square(n));
printf("\nQube : %d\n",qube(n));
qube(n);
getch();
}

77.Write a program using recursions for fibbonacci series in C language
 #include<stdio.h>
#include<conio.h>
#include<process.h>
fibbo(int pre, int cur ,int x)
{ int temp;
if(x==2)
{
getch();
exit(0);
}
temp=cur;
cur=pre+cur;
pre=temp;
printf("%d ",cur);
fibbo(pre,cur,x-1);
}
main()
{
int n,pre=1,cur=1;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("%d %d ",pre,cur);
fibbo(pre,cur,n);
getch();
}

78.Write a program using reccursions for fibbionacci series factorial in C language
#include<stdio.h>
#include<conio.h>
#include<process.h>

int fact(int n)
{
int f;
if(n==1)
return 1;
else
f=n*fact(n-1);
return f;
}
main()
{
int n;
clrscr();
printf("Enter number : ");
scanf("%d",&n);
printf("\nFactorial is…%d\n",fact(n));
getch();
}

79.Write a program to accept two numbers from user and swap their values using call by reference method in C language
#include<stdio.h>
#include<conio.h>
#include<process.h>

swap(int *x ,int *y)
{
int temp;
temp=*x;
*x=*y;
*y=temp;
}
main()
{
int a,b;
clrscr();
printf("Enter numbers : ");
scanf("%d%d",&a,&b);
printf("\nBefore Swapping a = %d, b = %d\n",a,b);
swap(&a,&b);
printf("\nAfter Swapping a = %d, b = %d\n",a,b);
getch();
}

80.Write a program to accept a string and print the string in reverse order in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1;
clrscr();
printf("Enter string : ");
scanf("%s",s1);
printf("Reverse String : %s",strrev(s1));
getch();
}

81.Write a program to calculate lenght of a given string in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1;
clrscr();
printf("Enter string : ");
scanf("%s",s1);
printf("Lenght: %d",strlen(s1));
getch();
}

82.Write a program to accept a string and print the string in upper case in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1;
clrscr();
printf("Enter string:");
scanf("%s",s1);
printf("String in UPPER CASE : %s",strupr(s1));
getch();
}

83.Write a program to accept a string and print the string in lower case in C language
 #include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1;
clrscr();
printf("Enter string: ");
scanf("%s",s1);
printf("String in lower case : %s",strlwr(s1));
getch();
}

84.Write a program to accept a string and print no. of aphlabets, digits, special symbols present in it in C language
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
main()
{
char *s;
int i,alpha=0,digit=0,symbol=0;
clrscr();
printf("Enter string : ");
scanf("%s",s);
for(i=0;s[i]!=’\0';i++)

if(isalpha(s[i]))
alpha++;
else if(isdigit(s[i]))
digit++;
else
symbol++;

printf("\nAphabets : %d",alpha);
printf("\nDigits : %d",digit);
printf("\nSymbols : %d",symbol);
getch();
}

85.Write a program to accept two strings and compare them in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1,*s2;
clrscr();
printf("Enter string 1 : ");
scanf("%s",s1);
printf("Enter string 2 : ");
scanf("%s",s2);

if(strcmp(s1,s2)>0)
printf("\nString 1 is greater..");
else if(strcmp(s1,s2)<0)
printf("\nString 2 is greater..");
else
printf("\nStrings are equal..");

getch();
}

86.Write a program to accept two strings and concatenate them in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1,*s2;
clrscr();
printf("Enter string 1 : ");
scanf("%s",s1);
printf("Enter string 2 : ");
scanf("%s",s2);
printf("\nCocatinated string is…%s",strcat(s1,s2));
getch();
}

87.Write a program to accept a string and copy it into another string in C language
#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
char *s1,*s2;
clrscr();
printf("Enter string 1 : ");
scanf("%s",s1);
strcpy(s2,s1);
printf("\nCopied string is…%s",s2);
getch();
}

88.Write a program to print length of a given string in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,len=0;
char *s;
clrscr();
printf("Enter the string….");
scanf("%s",s);
for(i=0;s[i]!=’\0';i++)
len++;
printf("The lenth of the string is…%d",len);
getch();
}

89.Write a program to copy a string into another string in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i;
char *s1,*s2;
clrscr();
printf("Enter the string 1….");
scanf("%s",s1);
for(i=0;s1[i]!=’\0';i++)
{
s2[i]=s1[i];
}
s2[i]=’\0';
printf("The copied string is…%s",s2);
getch();
}

90.Write a program to convert given string to UPPER CASE in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i;
char *s1;
clrscr();
printf("Enter the string 1….");
scanf("%s",s1);

for(i=0;s1[i]!=’\0';i++)
{
if((s1[i]>=’a’)&&(s1[i]<=’z’))
s1[i]=s1[i]-32;
}
printf("Resultant string is…%s",s1);
getch();
}

91.Write a program to convert givern string to lower case in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i;
char *s1;
clrscr();
printf("Enter the string 1….");
scanf("%s",s1);

for(i=0;s1[i]!=’\0';i++)
{
if((s1[i]>=’A’)&&(s1[i]<=’Z’))
s1[i]=s1[i]+32;
}

printf("Resultant string is…%s",s1);
getch();
}

92.Write a program to concatinate two strings in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,len=0,j;
char *s1,*s2;
clrscr();
printf("Enter the string 1….");
scanf("%s",s1);
printf("Enter the string 2….");
scanf("%s",s2);

for(i=0;s1[i]!=’\0';i++)
{
len++;
}
j=0;
for(i=len;s2[j]!=’\0';i++)
{
s1[i]=s2[j];
j++;
}
s1[i]=’\0';

printf("Resultant string is…%s",s1);
getch();
}

93.Write a program to count no, of alphlabets, digits, special symbols in C language 
#include<stdio.h>
#include<conio.h>
main()
{
int i,alpha=0,digit=0,symbol=0;
char *s;
clrscr();
printf("Enter the string 1….");
scanf("%s",s);

for(i=0;s[i]!=’\0';i++)
{
if(((s[i]>=’A’)&&(s[i]<=’Z’))||((s[i]>=’a’)&&(s[i]<=’z’)))
alpha++;
else if((s[i]>=’0’)&&(s[i]<=’9’))
digit++;
else
symbol++;
}
printf("\nAlphabets : %d",alpha);
printf("\nDigits : %d",digit);
printf("\nSymbols : %d",symbol);
getch();
}

94.Write a program to compare two strings in C language
#include<stdio.h>
#include<conio.h>
#include<process.h>
main()
{
int i;
char *s1,*s2;
clrscr();
printf("Enter the string 1….");
scanf("%s",s1);
printf("Enter the string 2….");
scanf("%s",s2);

for(i=0;s1[i]!=’\0';i++)
{
if(s1[i]!=s2[i])
{
if(s1[i]>s2[i])
printf("\nString 1 is greater…");
else
printf("\nString 2 is greater…");
getch();
exit(0);
}
}
printf("String are equal….");
getch();
}

95.Write a program to count all vowels present in the string in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,vowel=0;
char *s;
clrscr();
printf("Enter the string 1….");
scanf("%s",s);

for(i=0;s[i]!=’\0';i++)
{
if((s[i]==’A’)||(s[i]==’E’)||(s[i]==’O’)||(s[i]==’U’)||(s[i]==’I’)||
(s[i]==’a’)||(s[i]==’e’)||(s[i]==’o’)||(s[i]==’u’)||(s[i]==’i’))
vowel++;
}
printf("\nVowels : %d",vowel);
getch();
}

96.Write a program to reverse the given string in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i,j,len=0;
char *s1,*s2;
clrscr();
printf("Enter the string ….");
scanf("%s",s1);
for(i=0;s1[i]!=’\0';i++)
len++;
j=0;
for(i=len-1;i>=0;i–)
{
s2[j]=s1[i];
j++;
}
s2[j]=’\0';
printf("\nReversed String : %s",s2);
getch();
}

97.Write a program to check if the given string is palindrome or not E.g. NITIN, LIRIL, MALAYALAM.
#include<stdio.h>
#include<conio.h>
#include<process.h>
main()
{
int i,j,len=0;
char *s1,*s2;
clrscr();
printf("Enter the string ….");
scanf("%s",s1);
for(i=0;s1[i]!=’\0';i++)
len++;
j=0;
for(i=len-1;i>=0;i–)
{
s2[j]=s1[i];
j++;
}
s2[j]=’\0';
for(i=0;s1[i]!=’\0';i++)
if(s1[i]!=s2[i])
{
printf("\nNot a palindrome");
getch();
exit(0);
}
printf("Palindrome");
getch();
}

98.Define a structure Employee having elements emp_id, name,etc. Accept data and reprint it
#include<stdio.h>
#include<conio.h>

struct Employee
{
char name[50];
int emp_id;
long phone_no;
};

main()
{
struct Employee e;
clrscr();
printf("Enter name : ");
scanf("%s",&e.name);
printf("Enter emp_id: ");
scanf("%d",&e.emp_id);
printf("Enter Phone Number: ");
scanf("%ld",&e.phone_no);

printf("\n\nEnter name : %s",e.name);
printf("\n\nEnter Emp Id : %d",e.emp_id);
printf("\n\nEnter Phone Number : %ld ",e.phone_no);

getch();
}

99.Define a structure Student having fields roll_no, name, marks, etc, for 5 students, accept data and reprint
 #include<stdio.h>
#include<conio.h>

struct Student
{
char name[50];
int roll_no;
int m1,m2,m3;
};

main()
{ int i;
struct Student s[5];
clrscr();
for(i=0;i<5;i++)
{ printf("\nEnter data for Student %d…..\n",i+1);
printf("Enter name : ");
scanf("%s",&s[i].name);
printf("Enter Roll No. : ");
scanf("%d",&s[i].roll_no);
printf("Enter marks for sub1 : ");
scanf("%d",&s[i].m1);
printf("Enter marks for sub2 : ");
scanf("%d",&s[i].m2);
printf("Enter marks for sub3 : ");
scanf("%d",&s[i].m3);
}

for(i=0;i<5;i++)
{ printf("\nStudent %d\n",i+1);
printf("Name : %s\n",s[i].name);
printf("Roll No.: %d\n",s[i].roll_no);
printf("Sub1 : %d\n",s[i].m1);
printf("Sub2 : %d\n",s[i].m2);
printf("Sub3 : %d\n",s[i].m3);
}

getch();
}

100.Define a structure Employee having elements emp_id, name, DOB, DOJ etc. Accept data and reprint it. (use structure within structure)
#include<stdio.h>
#include<conio.h>
 struct Date
{
int mm,dd,yy;
};

struct Employee
{
char name[50];
int emp_id;
struct Date DOB,DOJ;
};

main()
{ int i;
struct Employee e;
clrscr();
printf("\nEnter name : ");
scanf("%s",&e.name);
printf("\nEnter emp_id. : ");
scanf("%d",&e.emp_id);
printf("\nEnter Date of Joining\n ");
printf("(dd-mm-yy) : ");
scanf("%d-%d-%d", &e.DOJ.dd,&e.DOJ.mm,&e.DOJ.yy);
printf("\nEnter Date of birth\n ");
printf("(dd-mm-yy) : ");
scanf("%d-%d-%d", &e.DOB.dd,&e.DOB.mm,&e.DOB.yy);

printf("\nName : %s",e.name);
printf("\nEmployee ID : %d",e.emp_id);
printf("\nEnter DOJ : %d-%d-%d", e.DOJ.dd,e.DOJ.mm,e.DOJ.yy);
printf("\nEnter DOB : %d-%d-%d", e.DOB.dd,e.DOB.mm,e.DOB.yy);

getch();
}