[YTU]_2441( C++习题 复数类--重载运算符2+)

题目描述

定义一个复数类Complex，重载运算符“+”，使之能用于复数的加法运算。参加运算的两个运算量可以都是类对象，也可以其中有一个是整数，顺序任意。例如，c1+c2,i+c1,c1+i均合法(设i为整数,c1,c2为复数)。编写程序，分别求两个复数之和、整数和复数之和。

输入

两个复数
一个复数和一个整数
一个整数和一个复数

输出

两个复数之和、复数和整数之和，整数和复数之和。

样例输入

3 4 5 -10
3 4 5
5 3 4

样例输出

c1+c2=(8.00,-6.00i)
c1+i=(8.00,4.00i)
i+c1=(8.00,4.00i)
#include <iostream>
#include <iomanip>
using namespace std;
class Complex
{
public:
    Complex()
    {
        real=0;
        imag=0;
    }
    Complex(double r,double i)
    {
        real=r;
        imag=i;
    }
    Complex operator+(Complex &c2);
    Complex operator+(int &i);
    friend Complex operator+(int&,Complex &);
    void display();
private:
    double real;
    double imag;
};
Complex Complex:: operator+(Complex &c2)
{
    return Complex(real+c2.real,imag+c2.imag);
}
Complex Complex::operator+(int &i)
{
    return Complex(real+i,imag);
}
Complex operator+(int &i,Complex &c2)
{
    return Complex(i+c2.real,c2.imag);
}
void Complex::display()
{
    cout<<"("<<real<<','<<imag<<"i)"<<endl;
}
int main()
{
    double real,imag;
    cin>>real>>imag;
    Complex c1(real,imag);
    cin>>real>>imag;
    Complex c2(real,imag);
    cout<<setiosflags(ios::fixed);
    cout<<setprecision(2);
    Complex c3=c1+c2;
    cout<<"c1+c2=";
    c3.display();
    int i;
    cin>>real>>imag;
    cin>>i;
    c3=Complex(real,imag)+i;
    cout<<"c1+i=";
    c3.display();
    cin>>i;
    cin>>real>>imag;
    c1=Complex(real,imag);
    c3=i+c1;
    cout<<"i+c1=";
    c3.display();
    return 0;
}