我知道已经有很多人对此有疑问，所以请耐心听我解答这一问题。
于是我发现了这个问题，对修改这个有疑问。
class Blah {
public:
Blah();
Blah(int x, int y);
int x;
int y;
Blah operator =(Blah rhs);
};
Blah::Blah() {}
Blah::Blah(int xp, int yp) {
x = xp;
y = yp;
}
Blah Blah::operator =(Blah rhs) {
x = rhs.x;
y = rhs.y;
return *this;
}
int main() {
Blah b1(2, 3);
Blah b2(4, 1);
Blah b3(8, 9);
Blah b4(7, 5);
b3 = b4 = b2 = b1;
cout << b3.x << ", " << b3.y …