#include <stdio.h>

/* strcmp: return <0 if s<t, 0 if s==t, >0 if s>t, pointer version */
int strcmp(char *s, char *t)
{
	for (; *s == *t; s++, t++)
		if (*s == '\0')
			return 0;
	return *s - *t;
}

int main(void)
{
	char *s = "Aloha";
	char t[] = "Aloha";
	char t1[] = "Aloha1";
	char t2[] = "Aloh";
	printf("%d\n", strcmp(s, t));
	printf("%d\n", strcmp(s, t1));
	printf("%d\n", strcmp(s, t2));
	return 0;
}