类内函数
创建了一个名为MyClass的类,并在其中实现了默认构造函数、参数化构造函数、拷贝构造函数、移动构造函数、析构函数、拷贝赋值运算符、移动赋值运算符、成员函数、静态成员函数和友元函数。在主函数中,我们创建了几个类对象,并演示了这些函数的调用和使用。请注意,输出语句被添加到每个函数的实现中,以便在调用时打印出相应的消息,以便我们可以清楚地看到每个函数的调用顺序
class MyClass { public: int value; // Default constructor MyClass() { value = 0; cout << "Default constructor called" << endl; } // Parameterized constructor MyClass(int val) { value = val; cout << "Parameterized constructor called" << endl; } // Copy constructor MyClass(const MyClass& other) { value = other.value; cout << "Copy constructor called" << endl; } // Move constructor MyClass(MyClass&& other) noexcept { value = other.value; cout << "Move constructor called" << endl; } // Destructor ~MyClass() { cout << "Destructor called" << endl; } // Copy assignment operator MyClass& operator=(const MyClass& other) { if (this != &other) { value = other.value; } cout << "Copy assignment operator called" << endl; return *this; } // Move assignment operator MyClass& operator=(MyClass&& other) noexcept { value = other.value; cout << "Move assignment operator called" << endl; return *this; } // Member function void printValue() { cout << "Value: " << value << endl; } // Static member function static void staticFunction() { cout << "Static function called" << endl; } // Friend function friend void friendFunction(const MyClass& obj); }; void friendFunction(const MyClass& obj) { cout << "Friend function called. Value: " << obj.value << endl; } int main() { MyClass obj1; // Default constructor called obj1.value = 10; MyClass obj4(20); MyClass obj2(obj1); // Copy constructor called MyClass obj3 = std::move(obj4); // Move constructor called obj2 = obj3; // Copy assignment operator called obj3 = std::move(obj2); // Move assignment operator called obj3.printValue(); // Value: 10 MyClass::staticFunction(); // Static function called friendFunction(obj3); // Friend function called. Value: 10 return 0; }