Palindrome number in c program

Palindrome number

#include <stdio.h>

#include <string.h>

main()

{

   char a[100], b[100];

   clrscr();

   printf("Enter the string to check if it is a palindrome\n");

   gets(a);

   strcpy(b,a);

   strrev(b);

   if( strcmp(a,b) == 0 )

      printf("Entered string is a palindrome.\n");

   else

      printf("Entered string is not a palindrome.\n");

   return 0;

}