c++空复制赋值运算符复制数据

#include <iostream>
#include <cstring>

class MyClass {
public:
    int* data;
    int size;

    // 构造函数
    MyClass(int s) : size(s), data(new int[s]) {
        std::cout << "Constructor called" << std::endl;
    }

    // 复制构造函数
    MyClass(const MyClass& other) : size(other.size), data(new int[other.size]) {
        std::memcpy(data, other.data, size * sizeof(int));
        std::cout << "Copy constructor called" << std::endl;
    }

    // 复制赋值运算符
    MyClass& operator=(const MyClass& other) {
        if (this != &other) {
            delete[] data; // 释放原有资源
            size = other.size;
            data = new int[size];
            std::memcpy(data, other.data, size * sizeof(int));
        }
        std::cout << "Copy assignment operator called" << std::endl;
        return *this;
    }

    // 析构函数
    ~MyClass() {
        delete[] data;
        std::cout << "Destructor called" << std::endl;
    }
};

int main() {
    MyClass obj1(5);
    MyClass obj2 = obj1; // 调用复制构造函数
    MyClass obj3(10);
    obj3 = obj1; // 调用复制赋值运算符
    return 0;
}