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Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/globals.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/v/vprintf.html on line 1
Warning: main(/www/www/htdocs/style/header.php) [function.main]: failed to open stream: No such file or directory in /www/www/docs/6.4.1/neutrino/lib_ref/v/vprintf.html on line 8
Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/header.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/v/vprintf.html on line 8
Write formatted output to standard output (varargs)
#include <stdio.h>
#include <stdarg.h>
int vprintf( const char* format,
va_list arg );
- format
- A string that specifies the format of the output.
The formatting string determines what additional arguments you need to
provide.
For more information, see
printf().
- arg
- A variable-argument list of the additional arguments, which you
must have initialized with the
va_start()
macro.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The vprintf() function writes output to the file stdout,
under control of the argument format.
The vprintf() function is a “varargs” version of
printf().
The number of characters written, or
a negative value if an output error occurred
(errno is set).
Use vprintf() in a general error message
routine:
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
void errmsg( const char* format, ... )
{
va_list arglist;
printf( "Error: " );
va_start( arglist, format );
vprintf( format, arglist );
va_end( arglist );
}
int main( void )
{
errmsg( "%s %d %s", "Failed", 100, "times" );
return EXIT_SUCCESS;
}
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
errno,
fprintf(),
fwprintf(),
printf(),
snprintf(),
sprintf(),
swprintf(),
va_start()
vfprintf(),
vfwprintf(),
vsnprintf(),
vsprintf(),
vswprintf(),
vwprintf(),
wprintf()
vsprintf()
Warning: main(/www/www/htdocs/style/footer.php) [function.main]: failed to open stream: No such file or directory in /www/www/docs/6.4.1/neutrino/lib_ref/v/vprintf.html on line 173
Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/footer.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/v/vprintf.html on line 173