学步园

指针的情况

class Test{
public:
    int a;
    Test(){
        a = 1;
    }
};

int main()
{
    Test* t1 = new Test();
    t1->a = 10;
    
    Test* t2 = new Test();
    t2->a = 5;
    
    cout << "&t1:" << t1 << " a = " << t1->a << endl;
    cout << "&t2:" << t2 <<  " a = " << t2->a <<endl;
    
    cout << "------------------------------" << endl;
    t2 = t1;
    cout << "&t1:" << t1 << " a = " << t1->a << endl;
    cout << "&t2:" << t2 <<  " a = " << t2->a <<endl;
    
    cout << "------------------------------" << endl;
    
    t1->a = 111;
    t2->a = 222;
    cout << "&t1:" << t1 << " a = " << t1->a << endl;
    cout << "&t2:" << t2 <<  " a = " << t2->a <<endl;
    
    return 0;
}

对象的情况:

class Test{
public:
    int a;
    Test(){
        a = 1;
    }
};
int main()
{
    Test t1;
    t1.a = 10;
    
    Test t2;
    t2.a = 5;
    
    cout << "&t1:" << &t1 << " a = " << t1.a << endl;
    cout << "&t2:" << &t2 <<  " a = " << t2.a <<endl;
    
    cout << "------------------------------" << endl;
    t2 = t1;
    cout << "&t1:" << &t1 << " a = " << t1.a << endl;
    cout << "&t2:" << &t2 <<  " a = " << t2.a <<endl;
    
    cout << "------------------------------" << endl;
    
    t1.a = 111;
    t2.a = 222;
    cout << "&t1:" << &t1 << " a = " << t1.a << endl;
    cout << "&t2:" << &t2 <<  " a = " << t2.a <<endl;
    
    return 0;
}

记住：在默认情况下，将一个对象赋给同类型的另外一个对象时，C++将源对象的每个数据成员复制到目标对象中相应的数据成员中

至于不同之处，自己打印..........