我有一个笛卡尔类的代码,现在我想添加一个成员赋值来将 coord1 的值设置为 coord2。我不太确定如何去做。为类对象编写成员赋值的语法是什么?我会对类本身进行更改,还是将它们放在主函数中?
#include <iostream>
using namespace std;
class Cartesian
{
private:
double x;
double y;
public:
Cartesian( double a = 0, double b = 0) : x(a), y(b){}
friend istream& operator>>(istream&, Cartesian&);
friend ostream& operator<<(ostream&, const Cartesian&);
};
istream& operator>>(istream& in, Cartesian& num)
{
cin >> num.x >> num.y;
return in;
}
ostream& operator<<( ostream& out, const Cartesian& num)
{
cout << "(" << num.x << ", " << num.y << ")" << endl;
return out;
}
int main()
{
Cartesian coord1, coord2;
cout << "Please enter the first coordinates in the form x y" << endl;
cin >> coord1;
cout << "Please enter the second coordinates in the form x y" << endl;
cin >> coord2;
cout << coord1;
cout << coord2;
return 0;
}