Vprintf, vfprintf, and vsprintf Functions

Vprintf, vfprintf, and vsprintf

Syntax:

# Include <stdarg. h> # include <stdio. h> int vprintf (char * format, va_list arg_ptr); int vfprintf (File * stream, const char * format, va_list arg_ptr); int vsprintf (char * buffer, char * format, va_list arg_ptr );

These functions andPrintf ()Very similar,Fprintf ()AndSprintf ()The difference is that the parameter list is a pointer to a series of parameters.Va_listDefined in stdarg. H, and can also beVa_arg ()Example:

Void error (char * FMT ,...) {va_list ARGs; va_start (ARGs, FMT); fprintf (stderr, "error:"); vfprintf (stderr, FMT, argS); fprintf (stderr, "/N "); va_end (ARGs); exit (1 );}