实验一 类与对象

实验任务2

使用C++语言特性中支持面向对象的语法，实现一个Point类来描述点的基础属性和操作。 

 1 #include<iostream>
 2 using namespace std;
 3 class Point {
 4 public:
 5     Point(int x0 = 1, int y0 = 2);
 6     Point(const Point& p);
 7     ~Point() = default;
 8     int get_x()const { return x; }
 9     int get_y()const { return y; }
10     void show()const;
11 private:
12     int x, y;
13 };
14 Point::Point(int x0, int y0) :x{ x0 }, y{ y0 }{
15     cout << "constrctor called" << endl;
16 }
17 Point::Point(const Point& p) : x{ p.x }, y{ p.y }{
18     cout << "copy constrctor called" << endl;
19 }
20 void Point::show()const {
21     cout << "(" << x << "," << y << ")" << endl;
22 }
23 int main() {
24     Point p1;
25     p1.show();
26     Point p2(4, 5);
27     p2.show();
28     Point p3 = p2;
29     p3.show();
30     Point p4{ p3 };
31     p4.show();
32     cout << p4.get_x() << endl;
33 }

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