Вызов из потомка конструктор родителя

package u;
 class A{
private int a,b,c;
A(){}
A(int x1, int y1, int z1){
    a = x1; b = y1; c = z1;
 }


void result(){
   System.out.println(a*b*c);
}
}

 class B extends A{
    B(){}
    B(int s1, int s2, int s3){
        super(s1,s2,s3);
    }
}

public class Main {
    public static void main(String[] args) {
     B obj = new B(5,7,9);
     obj.result();
    }

}

<?php
class Base {
 
private  $a, $b, $c;
function Base($x, $y, $z){
    $this->a = $x; $this->b = $y; $this->c = $z;
}
 function result(){
    echo $this->a*$this->b*$this->c;
 }
}
 
class B extends Base {
  function B($w1,$w2, $w3){
  parent::Base($w1,$w2,$w3);
  }
 }
 
$obj = new B(1,2,3);
$obj->result();
 
?>

#include <iostream>
using namespace std;

class A{
private: int a,b,c;
public:
	A(){}
	A(int x1,int x2, int x3)
	{
		a = x1;  b = x2;  c = x3;
	}
	void yra(){
		cout<<a*b*c;
	}
	
};

class B:public A{
public:
	B(){}
	B(int w1, int w2, int w3){
		super(w1,w2,w3);
	}
};



int main() {

	B *obj = new B(1,2,3);
	obj->yra();
	cin.get();
}