vfprintf

Syntax

#include <stdio.h> #include <stdarg.h> int vfprintf(FILE *file, const char *format, va_list arguments);

Description

Sends formatted output from the arguments to the file. See section printf.

Return Value

The number of characters written.

Portability

ANSI/ISO C	C89; C99
POSIX	1003.2-1992; 1003.1-2001

Example

void my_errmsg(char *format, ...) { va_list arg; va_start(arg, format); fprintf(stderr, "my_errmsg: "); vfprintf(stderr, format, arg); va_end(arg); }