#include "iostream"
using std::endl;
using std::cin;
using std::cout;
using std::ostream;

class Test
{
private:
    int a;
    int b;
public:
    Test()
    {

    }
public:
    Test(int a, int b)
    {
        this->a = a;
        this->b = b;
    }
public:
    Test(const Test& obj)
    {
        this->a = obj.a + 10;
        this->b = obj.b + 10;
    }
public:
    friend ostream& operator<<(ostream& cout, Test t);

};

ostream& operator<<(ostream& cout, Test t)
{
    cout << t.a << "　" << t.b << endl;
    return cout;
}

Test fun2()
{
    Test t4(222, 333);
    return t4;
}

void main()
{
    Test t1 = fun2();
    cout << t1 << endl;

    Test t2;
    t2 = fun2();
    cout << t2 << endl;
    system("pause");
}
/*问题 打印结果为啥是242 353  不是 232 343
242　353
242　353
*/

Test fun2()
{
    Test t4(222, 333);
    return t4; // 可能调用一次拷贝构造
}

ostream& operator<<(ostream& cout, Test t) // 调用一次拷贝构造

哦哦 好的谢谢啦