2015年第十四周oj刷题：

Problem J: C++习题 复数类--重载运算符+

Time Limit: 1 Sec   Memory Limit: 128 MB
Submit: 871   Solved: 577
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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。将运算符函数重载为非成员、非友元的普通函数。编写程序，求两个复数之和。

Input

两个复数

Output

复数之和

Sample Input

3 4
5 -10

Sample Output

(8.00,-6.00i)

#include <iostream>

#include <iomanip>

using namespace std;

class Complex

{

public:

    Complex();

    Complex(double r,double i);

    double get_real();

    double get_imag();

    void display();

private:

    double real;

    double imag;

};
double Complex::get_imag()
{
    return imag;
}
double Complex::get_real()
{
    return real;
}
Complex::Complex(double r,double i)
{
    real=r;
    imag=i;
}
Complex operator+(Complex &c1,Complex &c2)
{
    return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag());
}
void Complex::display()
{
    cout<<"("<<real<<","<<imag<<"i)";
}
int main()

{

    double real,imag;

    cin>>real>>imag;

    Complex c1(real,imag);

    cin>>real>>imag;

    Complex c2(real,imag);

    Complex c3=c1+c2;

    cout<<setiosflags(ios::fixed);

    cout<<setprecision(2);

    c3.display();

    return 0;

}