1: 2: 3: /******* 4: * prefix(s1, s2) check s2 for prefix s1 5: * char *s1, *s2; 6: * 7: * return 0 - != 8: * return 1 - == 9: */ 10: 11: prefix(s1, s2) 12: char *s1, *s2; 13: { 14: char c; 15: 16: while ((c = *s1++) == *s2++) 17: if (c == '\0') 18: return(1); 19: return(c == '\0'); 20: }