操作系统SunOS 4.1.3版本的源码

				#if !defined(lint) && defined(SCCSIDS)				static	char sccsid[] = "@(#)strchr.c 1.1 92/07/30 SMI"; /* from S5R2 1.2 */				#endif								/*LINTLIBRARY*/				/*				 * Return the ptr in sp at which the character c appears;				 * NULL if not found				 */								#define	NULL	0								char *				strchr(sp, c)				register char *sp, c;				{					do {						if(*sp == c)							return(sp);					} while(*sp++);					return(NULL);				}