c清华大学出版社第4版课件第8章.pptVIP

*;*;*;*;*;*;*;*;*;*;*;#include iostream using namespace std; class Complex { //复数类定义 public: //外部接口 Complex(double r = 0.0, double i = 0.0) : real(r), imag(i) { } //构造函数 Complex operator + (const Complex c2) const; //运算符+重载成员函数 Complex operator - (const Complex c2) const; //运算符-重载成员函数 void display() const; //输出复数 private: //私有数据成员 double real; //复数实部 double imag; //复数虚部 };;Complex Complex::operator + (const Complex c2) const { //重载运算符函数实现 return Complex(real + c2.real, imag + c2.imag); //创建一个临时无名对象作为返回值 } Complex Complex::operator - (const Complex c2) const { //重载运算符函数实现 return Complex(real - c2.real, imag - c2.imag); //创建一个临时无名对象作为返回值 };void Complex::display() const { cout ( real , imag ) endl; } int main() { //主函数 Complex c1(5, 4), c2(2, 10), c3; //定义复数类的对象 cout c1 = ; c1.display(); cout c2 = ; c2.display(); c3 = c1 - c2; //使用重载运算符完成复数减法 cout c3 = c1 - c2 = ; c3.display(); c3 = c1 + c2; //使用重载运算符完成复数加法 cout c3 = c1 + c2 = ; c3.display(); return 0; };程序输出的结果为： c1 = (5, 4) c2 = (2, 10) c3 = c1 - c2 = (3, -6) c3 = c1 + c2 = (7, 14);*;*;*;#include iostream using namespace std; class Clock { //时钟类声明定义 public: //外部接口 Clock(int hour = 0, int minute = 0, int second = 0); void showTime() const; Clock operator ++ (); //前置单目运算符重载 Clock operator ++ (int);//后置单目运算符重载 private: //私有数据成员 int hour, minute, second; };;//前置单目运算符重载函数 Clock Clock::operator ++ () { second++; if (second = 60) { second -= 60; minute++; if (minute = 60) { minute -= 60; hour = (hour + 1) % 24; } } return *this; };//后置单目运算符重载 Clock Clock::operator ++ (int) { //注意形参表中的整型参数 Clock old = *this; ++(*this); //调用前置“++”运算符 return old; };//其它成员函数的实现略 int main() { Clock myClock(23, 59, 59); cout First time output: ; myClock.showTime(); cout Show myClock++: ; (myClock++).showTime(); cout Show ++myClock: ; (++myClock).showTime(); return 0; };程序运行结果为： First time output: 23:59:59 Show myClock++: 23:59:59 Show ++myClock: 0:0:1;*;*;*;#include iostream