#include "apue.h"char	*getpass(const char *);intmain(void){	char	*ptr;	if ((ptr = getpass("Enter password:")) == NULL)		err_sys("getpass error");	printf("password: %s\n", ptr);	/* now use password (probably encrypt it) ... */	while (*ptr != 0)		*ptr++ = 0;		/* zero it out when we're done with it */	exit(0);}