PTA: Analyzing palindromic string (15 minutes) (C language)

This question requires write function, determine whether a given string of characters is "palindrome." The so-called "palindrome" refers to read and read backwards along the same string. Such as "XYZYX" and "xyzzyx" is a palindrome.

Interface definition function:
BOOL Palindrome (char * S);

Palindrome function determines whether the input string char * s palindrome. If it returns true, otherwise false.

Referee test sample program:
#include <stdio.h>
#include <string.h>

#define MAXN 20
typedef enum {false, true} bool;

bool palindrome( char *s );

int main()
{
char s[MAXN];

scanf("%s", s);
if ( palindrome(s)==true )
    printf("Yes\n");
else
    printf("No\n");
printf("%s\n", s);

return 0;

}

/ * Your code will be embedded here * /

Sample Input 1:
thisistrueurtsisiht

Output Sample 1:
Yes
thisistrueurtsisiht

Sample Input 2:
thisisnottrue

Output Sample 2:
No
thisisnottrue

bool palindrome( char *s )
{
    int judge = 1;
    int i, j;
    j = strlen(s) - 1;
    for (i = 0; i <= j; i++,j--)
    {
        if (s[i] != s[j])
            judge = 0;
    }
    if (judge == 1)
        return true;
    else
        return false;
}