Why is the constructor for my class not being called in this case?

I am 开发者_如何学Pythoncreating a new class instance like this:

Cube* cube1;

There is code in the Cube constructor, but it's not being run! Is this usual?

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You're actually not creating any instance.

the variable you're calling cube1 is a pointer to a Cube.

To create a Cube you should have:

Cube* cube1 = new Cube();

This create a new instance of Cube in heap memory, you should call delete cube1 once you don't use it anymore.

or:

Cube cube1;

This create a new instance of Cube in stack memory, it will be destroyed once it goes out of scope.

PS. you should get a C++ textbook.

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You're not creating an instance of a Cube; you're creating a pointer to a Cube.

To create a pointer to a new instance of a Cube, you'd want code like this:

Cube* cube1 = new Cube;