class A {   //here is a class A
   public:
     int *a;

     A(){ a = new int; *a=22;}

     A foo(){ A anA;        //anA is an object of class A
              *anA.a=44;
              return anA;
     }

     ~A(){ delete a;}

};

int main(){

     A B;

     B=B.foo();

     //What is the value of B.a at this line of the code
}

#include <cstdio>

class A
{
public:
    int *a;

    A()
    {
        a = new int;
        printf("A::A(0x%p): a is 0x%pn", this, a);
        *a = 22;
    }

    A foo()
    {
        A anA;
        *anA.a = 44;
        return anA;
    }

    ~A()
    {
        printf("A::~A(0x%p): a is 0x%pn", this, a);
        delete a;
    }

};

int main(int argc, char** argv)
{
    A B;
    B = B.foo();
}

#include <cstdio>

class A
{
public:
    int *a;

    A()
    {
        a = new int;
        printf("A::A()(0x%p): a is 0x%pn", this, a);
        *a = 22;
    }

    A(const A& otherA)
    {
        a = new int;
        printf("A::A(const A& otherA)(0x%p): a is 0x%pn", this, a);
        *a = *otherA.a;
    }

    A& operator=(const A& otherA)
    {
        printf("A::operator=(const A& otherA)(0x%p)n", this);
        // What are the semantics here? Transfer ownership? Copy Value?
        *a = *otherA.a;
        return *this;
    }
    A foo()
    {
        A anA;
        *anA.a = 44;
        return anA;
    }

    ~A()
    {
        printf("A::~A(0x%p): a is 0x%pn", this, a);
        delete a;
    }

};

int main(int argc, char** argv)
{
    {
        A B;
        B = B.foo();
        printf("B.a is %dn", *B.a);
    }
    return 0;
}