API reference for vsnprintf, _vsnprintf, _vsnprintf_l, _vsnwprintf, and _vsnwprintf_l; which write formatted output using a pointer to a list of arguments.
vsnprintf,_vsnprintf, and _vsnwprintf return the number of characters written if the number of characters to write is less than or equal to count; if the number of characters to write is greater than count, these functions return -1 indicating that output has been truncated. The return ...
If you get an undefined external_vsnprintf_serror and are using the Universal C Runtime, addlegacy_stdio_definitions.libto the set of libraries to link. The Universal C Runtime doesn't export this function directly and is instead defined inline in<stdio.h>. For m...
not including the terminating null, or a negative value if an output error occurs. vsnprintf_s is identical to _vsnprintf_s. vsnprintf_s is included for compliance to the ANSI standard. _vnsprintf is retained for backward compatibility. ...
int _vsnprintf_s_l( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, locale_t locale, va_list argptr ); int _vsnwprintf_s( wchar_t *buffer, size_t sizeOfBuffer, size_t count, const wchar_t *format,
vsnprintf_s,_vsnprintf_s and _vsnwprintf_s return the number of characters written, not including the terminating null, or a negative value if an output error occurs. vsnprintf_s is identical to _vsnprintf_s. vsnprintf_s is included for compliance to the ANSI standard. _vnsprintf is...
nSize = vsnprintf_s( buff, sizeof(buff), _TRUNCATE, formatstring, args); printf("nSize: %d, buff: %s\n", nSize, buff); } int main() { FormatOutput("%s %s", "Hi", "there"); FormatOutput("%s %s", "Hi", "there!"); ...