Код: Выделить всё
#include "stdafx.h"
#include <conio.h>
using namespace std;
class Point {
private: // Data members (private)
int x, y;
public: // Constructors
Point() {};
Point(int new_x, int new_y) {set(new_x, new_y);}
Point(const Point &src) {set(src.x, src.y);}
// Operations
Point add(const Point &pt);
Point sub(const Point &pt);
Point operator+(const Point &pt) {return add(pt);}
Point operator-(const Point &pt) {return sub(pt);}
friend ostream &operator<<(ostream &os, Point &pt); // FUNCTION DECLARED
// Other member functions
void set(int new_x, int new_y);
int get_x() const {return x;}
int get_y() const {return y;}
};
int main() {
Point point1(20, 20);
Point point2(0, 5);
Point point3(-10, 25);
Point point4 = point1 + point2 + point3;
cout << "The point is " << point4 << endl; // TEST OPERATOR<< FUNCT.
return 0;
}
void Point::set(int new_x, int new_y) {
if (new_x < 0)
new_x *= -1;
if (new_y < 0)
new_y *= -1;
x = new_x;
y = new_y;
}
Point Point::add(const Point &pt) {
Point new_pt;
new_pt.x = x + pt.x;
new_pt.y = y + pt.y;
return new_pt;
}
Point Point::sub(const Point &pt) {
Point new_pt;
new_pt.x = x - pt.x;
new_pt.y = y - pt.y;
return new_pt;
}
ostream &operator<<(ostream &os, Point &pt) { // FUNCTION DEFINITION
os << "(" << pt.x << ", " << pt.y << ")";
return os;
} Вот строка
Код: Выделить всё
cout << "The point is " << point4 << endl; // TEST OPERATOR<< FUNCT.Код: Выделить всё
ostream &operator<<(ostream &os, Point &pt) { // FUNCTION DEFINITION
os << "(" << pt.x << ", " << pt.y << ")";
return os;
}