Program showing Whether given String Is Palindrome Or Not

#include<stdio.h>

#include<string.h>

main()

{

          char  s1[20],s2[20];

          clrscr();

          printf("Enter a string");

          gets(s1);

          strcpy(s2,s1);

          strrev(s2);

          if((strcmp(s1,s2))==0)

                   printf("String is a palindrome");

          else

                   printf("String is not a palindrome");

}