7.24.2.9 The vwprintf function

Synopsis

1

#include <stdarg.h>
#include <wchar.h>
int vwprintf(const wchar_t * restrict format,
     va_list arg);

Description

2

The vwprintf function is equivalent to wprintf, 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 vwprintf function does not invoke the va_end macro.[1]

Returns

3

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

Footnotes

[1]

As the functions vfwprintf, vswprintf, vfwscanf, vwprintf, vwscanf, and vswscanf invoke the va_arg macro, the value of arg after the return is indeterminate.