Write a user-defined function to perform Area of a square.
CODING:
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
int area(int);
clrscr();

printf("\n Enter The Side:");
scanf("%d",&a);

b=area(a);

printf("\n Area=%d",b);
getch();
}

int area(int a)
{
return(a*a);
}
OUTPUT: