在C++中移动语义2d向量

#include <iostream>
#include <utility> // for std::move

class Vector2D {
public:
    double x, y;

    // 默认构造函数
    Vector2D() : x(0), y(0) {}

    // 参数化构造函数
    Vector2D(double x, double y) : x(x), y(y) {}

    // 拷贝构造函数
    Vector2D(const Vector2D& other) : x(other.x), y(other.y) {
        std::cout << "Copy constructor called\n";
    }

    // 移动构造函数
    Vector2D(Vector2D&& other) noexcept : x(other.x), y(other.y) {
        std::cout << "Move constructor called\n";
        other.x = 0;
        other.y = 0;
    }

    // 拷贝赋值运算符
    Vector2D& operator=(const Vector2D& other) {
        if (this != &other) {
            x = other.x;
            y = other.y;
            std::cout << "Copy assignment called\n";
        }
        return *this;
    }

    // 移动赋值运算符
    Vector2D& operator=(Vector2D&& other) noexcept {
        if (this != &other) {
            x = other.x;
            y = other.y;
            other.x = 0;
            other.y = 0;
            std::cout << "Move assignment called\n";
        }
        return *this;
    }
};

Vector2D createVector() {
    return Vector2D(3.0, 4.0);
}

int main() {
    Vector2D v1;
    v1 = createVector(); // 这里会调用移动赋值运算符

    Vector2D v2 = std::move(v1); // 这里会调用移动构造函数

    return 0;
}