#include <lib9.h> intstrncmp(char *s1, char *s2, long n){	unsigned c1, c2; 	while(n > 0) {		c1 = *s1++;		c2 = *s2++;		n--;		if(c1 != c2) {			if(c1 > c2)				return 1;			return -1;		}		if(c1 == 0)			break;	}	return 0;}