Проверка Палиндромом C++

#include<stdio.h
#include<string.h
#include p1; ++p1, --p2)
{
*p1 ^= *p2;
*p2 ^= *p1;
*p1 ^= *p2;
}
return str;
}

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

//Get the number from user.
printf("Enter the string to check if it is a palindrome\n");
gets(a);

//copy input to another array b
strcpy(b,a);

//Reverse it.
strrev(b);

/*Compare it with the number entered by the user.If both are same then print palindrome number*/
if( strcmp(a,b) == 0 )
printf("\nEntered string is a palindrome.\n");
else
printf("\nEntered string is not a palindrome.\n");
getch();
return 0;
}