第九周【项目1-复数类中的运算符重载】

超、凢脫俗 2022-08-08 09:07 167阅读 0赞

问题及代码：

/*【项目1-复数类中的运算符重载（续）】
     *Copyright (c) 2014,烟台大学计算机学院
     *ALL right reserved
     *文件名：学生成绩统计
     *作者；童宇
     *完成日期：2015 年 5 月 13 日
     *版本号v1.0
     *问题描述：（1）再定义一目运算符 -，-c相当于0-c。
                （2）定义Complex类中的<<和>>运算符的重载，实现输入和输出，改造原程序中对运算结果显示方式，使程序读起来更自然。
    
     *输入描述：
     *程序输出：
     */
    #include <iostream>
    using namespace std;
    class Complex
    {
    private:
        double real;
        double imag;
    public:
        Complex()
        {
            real=0;
            imag=0;
        }
        Complex(double r,double i)
        {
            real=r;
            imag=i;
        }
        void setreal(double a)
        {
            real=a;
        }
        void setimag(double b)
        {
            imag=b;
        }
        double getreal()
        {
            return real;
        }
        double getimag()
        {
            return imag;
        }
        friend istream& operator>>(istream& input,Complex &c1);
        friend ostream& operator<<(ostream& output, Complex &c2);
    };
    
    istream& operator>>(istream& input,Complex &c1)
    {
        cout<<"输入复数 ，格式：(a,b)  a为实部，b为虚部";
        char a;
        input>>a>> c1.real>>a>>c1.imag>>a;
        return input;
    }
    ostream& operator<<(ostream& output, Complex &c2)
    {
        char a='(',b=',',c=')';
        cout<<a<<c2.real<<b<<c2.imag<<'i'<<c;
        return output;
    }
    Complex operator+(Complex &c1, Complex &c2)
    {
        Complex c;
        double a,b;
        a=c1.getreal()+c2.getreal();
        c.setreal(a);
        b=c1.getimag()+c2.getimag();
        c.setimag(b);
        return c;
    }
    Complex operator+(double d1, Complex &c2)
    {
        Complex c(d1,0);
        return c+c2;
    }
    Complex operator+(Complex &c1, double d2)
    {
        Complex c(d2,0);
        return c1+c;
    }
    Complex operator-(Complex &c1, Complex &c2)
    {
        Complex c;
        double a,b;
        a=c1.getreal()-c2.getreal();
        c.setreal(a);
        b=c1.getimag()-c2.getimag();
        c.setimag(b);
        return c;
    }
    Complex operator-(double d1, Complex &c2)
    {
        Complex c(d1,0);
        return c-c2;
    }
    Complex operator-(Complex c)
    {
         return 0-c;
    }
    Complex operator-(Complex &c1, double d2)
    {
        Complex c(d2,0);
        return c1-c;
    }
    Complex operator*(Complex &c1, Complex &c2)
    {
        Complex c;
        double a,b;
        a=c1.getreal()*c2.getreal();
        c.setreal(a);
        b=c1.getimag()*c2.getimag();
        c.setimag(b);
        return c;
    }
    Complex operator*(double d1, Complex &c2)
    {
        Complex c(d1,0);
        return c*c2;
    }
    Complex operator*(Complex &c1, double d2)
    {
        Complex c(d2,0);
        return c1*c;
    }
    Complex operator/(Complex &c1, Complex &c2)
    {
        Complex c;
        double a,b;
        a=c1.getreal()/c2.getreal();
        c.setreal(a);
        b=c1.getimag()/c2.getimag();
        c.setimag(b);
        return c;
    }
    Complex operator/(double d1, Complex &c2)
    {
        Complex c(d1,0);
        return c/c2;
    }
    Complex operator/(Complex &c1, double d2)
    {
        Complex c(d2,0);
        return c1/c;
    }
    int main()
    {
        Complex c1(3,4),c2(5,-10),c3;
        double d=11;
        cout<<"c1="<<c1<<endl;
        cout<<"c2="<<c2<<endl;
        cout<<"d="<<d<<endl<<endl;
        cout<<"下面是重载运算符的计算结果: "<<endl;
        c3=c1+c2;
        cout<<"c1+c2="<<c3<<endl;
        c3=(c1+d);
        cout<<"c1+d="<<c3<<endl;
        c3=(d+c1);
        cout<<"d+c1="<<c3<<endl;
        c3=c1-c2;
        cout<<"c1-c2="<<c3<<endl;
        c3=c1-d;
        cout<<"c1-d="<<c3<<endl;
        c3=d-c1;
        cout<<"d-c1="<<c3<<endl;
        c3=c1*c2;
        cout<<"c1*c2="<<c3<<endl;
        c3=c1*d;
        cout<<"c1*d="<<c3<<endl;
        c3=d*c1;
        cout<<"d*c1="<<c3<<endl;
        c3=c1/c2;
        cout<<"c1/c2="<<c3<<endl;
        c3=(c1/d);
        cout<<"c1/d="<<c3<<endl;
        c3=(d/c1);
        cout<<"d/c1="<<c3<<endl;
        return 0;
    }

运行结果：

![Center][]

[Center]: /images/20220805/78b3f427aee84d73961b293dc53d9f48.png