Write formatted output using a pointer to a list of arguments.
int vprintf( const char *format, va_list argptr );
int vwprintf( const wchar_t *format, va_list argptr );
| Routine | Required Header | Optional Headers | Compatibility |
| vprintf | <stdio.h> and <stdarg.h> | <varargs.h>1 | ANSI, Win 95, Win NT |
| vwprintf | <stdio.h> or <wchar.h>, and <stdarg.h> | <varargs.h>1 | ANSI, Win 95, Win NT |
1 Required for UNIX V compatibility.
For additional compatibility information, see Compatibility in the Introduction.
Libraries
| LIBC.LIB | Single thread static library, retail version |
| LIBCMT.LIB | Multithread static library, retail version |
| MSVCRT.LIB | Import library for MSVCRT.DLL, retail version |
Return Value
vprintf and vwprintf return the number of characters written, not including the terminating null character, or a negative value if an output error occurs.
Parameters
format
Format specification
argptr
Pointer to list of arguments
Remarks
Each of these functions takes a pointer to an argument list, then formats and writes the given data to stdout.
Generic-Text Routine Mappings
| TCHAR.H Routine | _UNICODE & _MBCS Not Defined | _MBCS Defined | _UNICODE Defined |
| _vtprintf | vprintf | vprintf | vwprintf |