7.19.6.10 The vprintf function

Synopsis

1

#include <stdarg.h>
#include <stdio.h>
int vprintf(const char * restrict format,
     va_list arg);

Description

2

The vprintf function is equivalent to printf, with the variable argument list replaced by arg, which shall have been initialized by the va_start macro (and possibly subsequent va_arg calls). The vprintf function does not invoke the va_end macro.[1]

Returns

3

The vprintf function returns the number of characters transmitted, or a negative value if an output or encoding error occurred.

Footnotes

[1]

As the functions vfprintf, vfscanf, vprintf, vscanf, vsnprintf, vsprintf, and vsscanf invoke the va_arg macro, the value of arg after the return is indeterminate.