why destructor in this code doesn't runs in visual studio's console application

Question

#include "stdafx.h"
#include <iostream>
using namespace std;

class ratio
{
public:
ratio();
void display();
~ratio();
};

ratio::ratio()
{
cout << "\n OBJECT IS BORN";
}
void ratio::display()
{
cout << "\n OBJECT IS ALIVE";
}
ratio :: ~ratio()
{
cout << "\n OBJECT DIES \n\n";
}

int main()
{
ratio x;
x.display();
system("pause");
return 0;
}

Answer 1

Suraj if you wanna check that behaviour in output, update your code in main as below :

{ratio x;
x.display();
}
system("pause");

here, {} allows object get destroyed before system command is executed... why because scope of object is bounded within {} and as system command is reached, object scope is over to check destructor behavior...

Answer 2

thank you Ketan Lalcheta

Answer 3

Suraj system command is the one.... in first line, you have created a object which is going to get destroyed at end of entire code execution...

your code ends at return 0 which initiate destruction call... but system command don't allow to reach code to that line and hence you are not able to check that result on VS...

Answer 4

yes it worked

Answer 5

pleasure... happy learning...