NAME

vfprintf vprintf vsnprintf vsprintf — format output of a stdarg argument list

SYNOPSIS

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

int vfprintf(FILE *stream, const char *format, va_list ap);
int vprintf(const char *format, va_list ap);
int vsnprintf(char *s, size_t n, const char *format, va_list ap);
int vsprintf(char *s, const char *format, va_list ap);

DESCRIPTION

The vprintf() , vfprintf() , vsnprintf() and vsprintf(3) functions are the same as printf(3) , fprintf(3) , snprintf(3) and sprintf(3) 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. As these functions invoke the va_arg macro, the value of ap after the return is indeterminate.

RETURN VALUE

Refer to printf(3) .

ERRORS

Refer to printf(3) .

EXAMPLES

None.

APPLICATION USAGE

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

FUTURE DIRECTIONS

None.

SEE ALSO

printf(3) , <stdarg.h> , <stdio.h> .

DERIVATION

Derived from Issue 1 of the SVID.