Check if the bits in a char are a palindrome

palindrome_char.c

#include <stdio.h>
#include <limits.h>

int isPalind(char c) {
	int a[CHAR_BIT];
	for(int i=0;i<CHAR_BIT;i++) {
		a[i] = (c >> i) & 1;
	}
	for (int i=0;i<5;i++) {
		if (a[i] != a[7-i]) {
			return -1;
		}
	}
	return 1;
}

int main(void) {
	if (isPalind(0xA5)!=-1) {
		printf("%s", "YES");
	} else {
		printf("%s", "NO");
	}
	return 0;
}