操作系统SunOS 4.1.3版本的源码

				#if !defined(lint) && defined(SCCSIDS)				static	char sccsid[] = "@(#)strlen.c 1.1 92/07/30 SMI"; /* from UCB 4.1 80/12/21 */				#endif								/*				 * Returns the number of				 * non-NULL bytes in string argument.				 */								strlen(s)					register char *s;				{					register int n;									n = 0;					while (*s++)						n++;					return (n);				}