C++ 修改外部类简单测试

class BB
{
public:
    BB()
    {

    }
    int x=10;
};

class CTest{
public:
    void set(BB &b)
    {
        this->b=&b;
        this->b->x=100;
    }

private:
    BB *b;
};

CTest t;
    BB b;
    cout<<b.x<<endl;
    t.set(b);
    cout<<b.x<<endl;