#include <u.h>#include <libc.h> intstrcmp(char *s1, char *s2){	unsigned c1, c2; 	for(;;) {		c1 = *s1++;		c2 = *s2++;		if(c1 != c2) {			if(c1 > c2)				return 1;			return -1;		}		if(c1 == 0)			return 0;	}}