[YTU]_2535( C++复数运算符重载(+与<<))
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与输出操作。
(1)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实数,顺序任意。例如,c1+c2,d+c1,c1+d均合法(设d为实数,c1,c2为复数)。
(2)输出的算数,在复数两端加上括号,实部和虚部均保留两位小数,如(8.23+2.00i)、(7.45-3.40i)、(-3.25+4.13i)等。
编写程序,分别求两个复数之和、整数和复数之和,并且输出。
请在下面的程序段基础上完成设计:
#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 &);
Complex operator+(double &);
friend Complex operator+(double&,Complex &);
friend ostream& operator << (ostream& output, const Complex& c);
private:
double real;
double imag;
};
//将程序需要的其他成份写在下面,只提交begin到end部分的代码
//******************** begin ********************
//********************* end ********************
int main()
{
//测试复数加复数
double real,imag;
cin>>real>>imag;
Complex c1(real,imag);
cin>>real>>imag;
Complex c2(real,imag);
Complex c3=c1+c2;
cout<<"c1+c2=";
cout<<c3;
//测试复数加实数
double d;
cin>>real>>imag;
cin>>d;
c3=Complex(real,imag)+d;
cout<<"c1+d=";
cout<<c3;
//测试实数加复数
cin>>d;
cin>>real>>imag;
c1=Complex(real,imag);
c3=d+c1;
cout<<"d+c1=";
cout<<c3;
return 0;
}
输入
一个复数的实部和虚部,另一个复数的实部和虚部
一个复数的实部和虚部,一个实数
一个实数,一个复数的实部和虚部
输出
两个复数之和、复数和实数之和,实数和复数之和。
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+d=(8.00+4.00i)
d+c1=(8.00+4.00i)
提示
只提交自己定义的函数部分,控制输出小数点后两位,用 setiosflags(ios::fixed);和setprecision(2);控制
#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 &); Complex operator+(double &); friend Complex operator+(double&,Complex &); friend ostream& operator << (ostream& output, const Complex& c); private: double real; double imag; }; Complex Complex::operator+(Complex &c) {return Complex(real+c.real,imag+c.imag);} Complex Complex::operator+(double &r) {return Complex(real+r,imag);} Complex operator+(double &r,Complex&c) {return Complex(r+c.real,c.imag);} ostream& operator<<(ostream &cout,const Complex &c) { cout<<setiosflags(ios::fixed); cout<<setprecision(2);cout<<'('<<c.real; if(c.imag>0) cout<<'+'; cout<<c.imag<<"i)"<<endl; } int main() { //测试复数加复数 double real,imag; cin>>real>>imag; Complex c1(real,imag); cin>>real>>imag; Complex c2(real,imag); Complex c3=c1+c2; cout<<"c1+c2="; cout<<c3; //测试复数加实数 double d; cin>>real>>imag; cin>>d; c3=Complex(real,imag)+d; cout<<"c1+d="; cout<<c3; //测试实数加复数 cin>>d; cin>>real>>imag; c1=Complex(real,imag); c3=d+c1; cout<<"d+c1="; cout<<c3; return 0; }