Copy constructor and its usage with simple example?

Answer 1

Thank you @EagleEye!

Answer 2

lets say we have a class Car. Than the copyconstructor would look like this: Car(const Car & other)

You can use this to copy data from an existing object when declaring a new object like:

Car BMW1(arguments,...);
Car BMW2(BMW1);

or (i think) also when assigning it like this (if you dont have a definition for operator=()):

Car BMW1(arguments,...);
Car BMW2 = BMW1;

and i think the copy constructor is also used in the following cases:
1) when passing Car obj by value to a function
2) when returning Car obj created inside a function (on the stack not heap)

These are all the cases where there is a copy constructor required. If you don't define a copy constructor then the member variables are just copied which can be a problem when you have pointer member vars. (correct me if i'm wrong somewhere)

Answer 3

Which language?

Answer 4

in C++ to be exactly

Answer 5

no problem!

Answer 6

Thanks EagleEye