每天打卡一小时 第十一天 编译四部曲

第一部曲 自然语言

创建函数，对函数进行定义声明

第二部曲 流程图

不用了吧

第三部曲 代码

#include <iostream>

using namespace std;

class Complex
{
    public:
        Complex(double r=0, double i=0):real(r), imag(i){    }
        Complex operator+(Complex& c2) const;//重载双目运算符'+'
        Complex operator-=(Complex& c2 ); //重载双目运算符'-='
        friend Complex operator-(Complex& c1, Complex& c2);//重载双目运算符'-'
        void Display() const;
    private:
        double real;
        double imag;
};

Complex Complex::operator+(Complex& c2) const//重载双目运算符'+'
{
    return Complex(real+c2.real,imag+c2.imag); 
}

Complex Complex::operator-=(Complex& c2 ) //重载双目运算符'-='
{
    return Complex(real-=c2.real,imag-=c2.imag);
}

Complex operator-(Complex& c1, Complex& c2) 
{
    Complex c;
    c.real = c1.real - c2.real;
    c.imag = c1.imag - c2.imag;
    return c;     
}

void Complex::Display() const
{
    cout << "(" << real << ", " << imag << ")" << endl;
}

int main()
{
    double r, m;
    cin >> r >> m;
    Complex c1(r, m);
    cin >> r >> m;
    Complex c2(r, m);
    Complex c3 = c1+c2;
    c3.Display();
    c3 = c1-c2;
    c3.Display();
    c3 -= c1;
    c3.Display();
    return 0;
} 

第四部曲 总结

常引用