String Concatenation

CODING:
#include <stdio.h>
#include <string.h>

int main()
{
char a[100], b[100];

printf("Enter the first string\n");
gets(a);

printf("Enter the second string\n");
gets(b);

strcat(a,b);

printf("String obtained on concatenation is %s\n",a);

return 0;
}