C++习题 复数类--重载运算符2+

Description

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。

Input

两个复数
一个复数和一个整数
一个整数和一个复数

Output

两个复数之和、复数和整数之和，整数和复数之和。

Sample Input

3 4 5 -103 4 55 3 4

Sample Output

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 &c){return Complex(i+c.real,c.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;}