1 /* @(#)strlen.c 4.1 (Berkeley) 12/21/80 */ 2 /* 3 * Returns the number of 4 * non-NULL bytes in string argument. 5 */ 6 7 strlen(s) 8 register char *s; 9 { 10 register n; 11 12 n = 0; 13 while (*s++) 14 n++; 15 return(n); 16 } 17