7-2 复数类的运算 (20 分)
根据以下代码段完善 ?? 处内容及程序内容，以实现规定的输出。
class Complex{
public:
Complex(double r=0, double i=0):real(r), imag(i){ }
Complex operator+( ?? ) const;//重载双目运算符'+'
Complex operator-=( ?? ); //重载双目运算符'-='
friend Complex operator-( ?? ) const;//重载双目运算符'-'
void Display() const; private: double real; double imag;
};void Complex::Display() const{ cout << "(" << real << ", " << imag << ")" << endl;
}int main(){ double r, m; cin >> r >> m; Complex c1(r, m); cin >> r >> m; Complex c2(r, m);
Complex c3 = c1+c2;
c3.Display();
c3 = c1-c2;
c3.Display();
c3 -= c1;
c3.Display(); return 0;
}
输入格式:
输入有两行，分别为两个复数的实部与虚部。
输出格式:
按样例格式输出结果。
输入样例:
在这里给出一组输入。例如：
4 2
3 -5
输出样例:
在这里给出相应的输出。例如：
(7, -3)
(1, 7)
(-3, 5)
作者
陈晓梅
单位
广东外语外贸大学
代码长度限制
16 KB
时间限制
400 ms
内存限制
64 MB
#include <iostream>
using namespace std;
class Complex
{
public:
Complex(double r=0, double i=0):real(r), imag(i){ }
Complex operator+(Complex c) const;
Complex operator-=(Complex c);
friend const Complex operator-(Complex c1,Complex c2) ;
void Display() const;
private:
double real;
double imag;
};
Complex Complex::operator+ (Complex c)const{
return Complex(real+c.real,imag+c.imag);
}
Complex Complex::operator-=(Complex c){
this->imag=this->imag-c.imag;
this->real=this->real-c.real;
return *this;
}
const Complex operator-(Complex c1,Complex c2){
c1.imag=c1.imag-c2.imag;
c1.real=c1.real-c2.real;
return c1;
}
void Complex::Display() const
{
cout << "(" << real << ", " << imag << ")" << endl;
}
int main()
{
double r, m;
cin >> r >> m;
Complex c1(r, m);
cin >> r >> m;
Complex c2(r, m);
Complex c3 = c1+c2;
c3.Display();
c3 = c1-c2;
c3.Display();
c3 -= c1;
c3.Display();
return 0;
}