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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);
}

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