C/C++，运算符重载

来源：互联网发布：北京亚信数据有限公司编辑：程序博客网时间：2024/04/29 01:55

编辑运算符重载源文件overload.cpp

#include <iostream>using namespace std;class Complex{    public:        Complex(){real = 0; imag = 0;}        Complex(double r, double i){real = r; imag = i;}        Complex operator +(Complex &c2);        void display();    private:        double real;        double imag;};Complex Complex::operator +(Complex &c2){    return Complex(real + c2.real, imag + c2.imag);}void Complex::display(){    cout << "(" << real << "," << imag << "i)" << endl;}int main(){    Complex c1(3, 4), c2(-5, 10), c3;    c3 = c1 + c2;    cout << "c1 = "; c1.display();    cout << "c2 = "; c2.display();    cout << "c3 = "; c3.display();    return 0;}

编译运行结果为：
这里写图片描述

修改上述源文件，将一个常数和一个复数相加：

#include <iostream>using namespace std;class Complex{    public:        Complex(){real = 0; imag = 0;}        Complex(double r, double i){real = r; imag = i;}        Complex operator +(Complex &c2);        void display();    private:        double real;        double imag;};Complex Complex::operator +(Complex &c2){    return Complex(real + c2.real, imag + c2.imag);}void Complex::display(){    cout << "(" << real << "," << imag << "i)" << endl;}int main(){    Complex c1(3, 4), c2(-5, 10), c3;    c3 = 3 + c2;    cout << "c1 = "; c1.display();    cout << "c2 = "; c2.display();    cout << "c3 = "; c3.display();    return 0;}

编辑结果：
这里写图片描述

根据上述编译时提示的错误信息可知：重载后运算符两边的数据类型应该一致。
将 c3 = 3 + c2;改为c3 = Complex(3, 0) + c2; 重新编译运行得到以下结果：
这里写图片描述

0 0