The Single UNIX ® Specification, Version 2
Copyright © 1997 The Open Group


vfwprintf, vwprintf, vswprintf - wide-character formatted output of a stdarg argument list


#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>

int vwprintf(const wchar_t *format, va_list arg);
int vfwprintf(FILE *stream, const wchar_t *format, va_list arg);
int vswprintf(wchar_t *s, size_t n, const wchar_t *format, 
    va_list arg);


The vwprintf(), vfwprintf() and vswprintf() functions are the same as wprintf(), fwprintf() and swprintf() respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined by <stdarg.h>.

These functions do not invoke the va_end macro. However, as these functions do invoke the va_arg macro, the value of ap after the return is indeterminate.


Refer to fwprintf().


Refer to fwprintf().




Applications using these functions should call va_end(ap) afterwards to clean up.




fwprintf(), <stdarg.h>, <stdio.h>, <wchar.h>.


Derived from the ISO/IEC 9899:1990/Amendment 1:1995 (E).

UNIX ® is a registered Trademark of The Open Group.
Copyright © 1997 The Open Group
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