/*
* Compare strings: s1>s2: >0 s1==s2: 0 s1<s2: <0
*/
int
strcmp(s1, s2)
register char *s1, *s2;
{
if(s1 == s2)
return(0);
while(*s1 == *s2++)
if(*s1++ == '\0')
return(*s1 - *--s2);
}