Writing a Default Constructor Forces Zero-Initialization?

Question

These are my class definitions:

class Foo{
    int _ent;
public:
    void printEnt() const{cout << _ent << \' \';}
};

class Bar{
    Foo _foo;
p         


        

Answer 1

When you provided a default constructor you no longer get the compiler generated one. Since your default constructor initializes the member to 0 the member will always be 0, this is especially true since the member is private and you have no way to change it.