vprintf

raw OCR

Writes formatted output to stdout.

Defined in header <stdarg.h>

Syntax

#include <stdarg.h>
int vprintf(const char *format, vajist arglist);

Portability

DOS	UNIX	Windows	ANSI C	C++ only
■	■		■

Remarks

Available on UNIX System V.

The v...printf functions are known as alternate entry points for the ...printf functions. They behave exactly like their ...printf counterparts, but they accept a pointer to a list of arguments instead of an argument list.

See printf for details

vprintf accepts a pointer to a series of arguments, applies to each a

on format specifiers.

format specifier format, and outputs the formatted data to stdout. There must be the same number of format specifiers as arguments.	contained in the format string pointed to by

When you use the SS!=DS flag, vprintf assumes that the address being passed is in the SS segment.

Return value

vprint returns the number of bytes output. In the event of error, vprint returns EOF.

Example

#include <stdio.h>

int vpf (char *fmt, ...)
{
   va_list argptr;
   int cnt ;
   va_start (argptr, format);
   cnt = vprintf (fmt, argptr);
   va_end(argptr) ;
   return (cnt);
}
int main (void)

   int inumber =30;
   float fnumber  = 90.0;
   char *string =  "abc";
   vpf("%d %f %s\n", inumber,fnumber,string) ;
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

These are search links, not yet checked by hand.

Stable link: /3.1/stdarg.h/vprintf/ · short form /3.1/vprintf/