#include <stdio.h>

int strend(char* const s, char* const t) {
    char* s_p = s;
    char* t_p = t;
    for (; *s_p != '\0'; s_p++);
    for (; *t_p != '\0'; t_p++);
    for (; !(s_p == s || t_p == t); s_p--, t_p--) {
        if (*s_p != *t_p) {
            return 0;
        }
    }
    return t_p == t;
}

int main(void) {
    printf("0==%d\n", strend("foo", "bar"));
    printf("1==%d\n", strend("foo", "foo"));
    printf("1==%d\n", strend("xyzfoo", "foo"));
    printf("0==%d\n", strend("foo", "xyzfoo"));
    printf("1==%d\n", strend("foo", ""));
    printf("1==%d\n", strend("", ""));
}