[C/C++] C++ 運算子重載(4)

class E
{
public:
    int *num;   // 指標必須再new 1份
    E& operator=(const E& rhs)
    {
        this->num = new int((*rhs.num));   // 避免互相影響
        return *this;
    }
}

class A
{
    //member operator
    A& operator+=(const A& rhs)
    {
        this->num += rhs.num;
        return *this;
    }
    int num;
};

E test1;
*test1.num = 5;
    
E test2;
test2 = test1;