_vscprintf, _vscprintf_l, _vscwprintf, _vscwprintf_l

 

For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.

Returns the number of characters in the formatted string using a pointer to a list of arguments.

int _vscprintf(  
   const char *format,  
   va_list argptr   
);  
int _vscprintf_l(  
   const char *format,  
   locale_t locale,  
   va_list argptr   
);  
int _vscwprintf(  
   const wchar_t *format,  
   va_list argptr   
);  
int _vscwprintf_l(  
   const wchar_t *format,  
   locale_t locale,  
   va_list argptr   
);  

Parameters

format
Format-control string.

argptr
Pointer to list of arguments.

locale
The locale to use.

For more information, see Format Specifications.

_vscprintf returns the number of characters that would be generated if the string pointed to by the list of arguments was printed or sent to a file or buffer using the specified formatting codes. The value returned does not include the terminating null character. _vscwprintf performs the same function for wide characters.

The versions of these functions with the _l suffix are identical except that they use the locale parameter passed in instead of the current thread locale.

If format is a null pointer, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, the functions return -1 and set errno to EINVAL.

Each argument (if any) is converted according to the corresponding format specification in format. The format consists of ordinary characters and has the same form and function as the format argument for printf.

System_CAPS_ICON_important.jpg Important

Ensure that if format is a user-defined string, it is null terminated and has the correct number and type of parameters. For more information, see Avoiding Buffer Overruns.

Generic-Text Routine Mappings

TCHAR.H routine_UNICODE & _MBCS not defined_MBCS defined_UNICODE defined
_vsctprintf_vscprintf_vscprintf_vscwprintf
_vsctprintf_l_vscprintf_l_vscprintf_l_vscwprintf_l
RoutineRequired header
_vscprintf, _vscprintf_l<stdio.h>
_vscwprintf, _vscwprintf_l<stdio.h> or <wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

See the example for vsprintf.

Stream I/O
fprintf, _fprintf_l, fwprintf, _fwprintf_l
printf, _printf_l, wprintf, _wprintf_l
scanf, _scanf_l, wscanf, _wscanf_l
sscanf, _sscanf_l, swscanf, _swscanf_l
vprintf Functions

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