vprintf

From Cppwiki

The vprintf family of functions operate in a manner similiar to the printf family. The only difference is that the vprintf functions take a named va_list argument in place of the trailing ... that the printf functions take. Typicially the printf family defers to the corresponding member of the vprintf family.

1. include <cstdio>
2. include <cstdarg>

namespace std {
  int vprintf(char const * format, va_list args);
  int vfprintf(FILE * file, char const * format, va_list args);
  int vsprintf(char * buffer, char const * format, va_list args);
  int vsnprintf(char * buffer, size_t size, char const * format, va_list args);
}
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Some libraries may also support:
<pre>int vasprintf(char ** buffer_pointer, char const * format, va_list args);

Libraries may in addition support wchar_t forms of these functions, with names of vwprintf, vfwprintf, vswprintf and vsnwprintf

See printf for a detailed description of the format parameter.