#!/usr/bin/perl
use strict;
use warnings;

sub f($)
{
        print 'f called with ',0+@_,' arguments: ',join(', ',@_),"\n";
}

sub g
{
        print 'via g: ';
        &f;
}

f(42);
&f(42);
&f();
&f(42,99,333);
g(42);
g();
g(42,99,333);