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Thursday, October 20, 2022

[FIXED] What happens to uninitialized class members in c++?

 October 20, 2022     c++, class, data-members     No comments   

Issue

What happens to uninitialized class members in c++? If I have to do this, what should I take care of?

#include <iostream> 
using namespace std;

class Foo {
    int attr1, attr2;   
public:
    Foo ();

Foo::Foo () {   attr1 = 5; }

Foo myThing(); 

Solution

What happens to uninitialized class members in c++?

They are default initialized, which in case of fundamental types like int means that it will have an indeterminate value.

what should I take care of?

You should take care to never read an indeterminate value.



Answered By - eerorika
Answer Checked By - David Marino (PHPFixing Volunteer)
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