C++习题 复数类--重载运算符+,-,*,/
时间： 1ms 内存：128M
描述：
定义一个复数类Complex，重载运算符“+”,“-”,“*”,“/”，使之能用于复数的加、减、乘、除。运算符重载函数作为Complex类的成员函数。编写程序，分别求两个复数之和、差、积和商。
输入：
两个复数
输出：
两个复数之和、差、积和商
示例输入：
3 4
5 -10
示例输出：
c1+c2=(8.00,-6.00i)
c1-c2=(-2.00,14.00i)
c1*c2=(55.00,-10.00i)
c1/c2=(-0.20,0.40i)
提示：
参考答案（内存最优[1092]）：
#include<stdio.h>
int main()
{
float a,b,c,d;
scanf("%f %f",&a,&b);
scanf("%f %f",&c,&d);
printf("c1+c2=(%.2f,%.2fi)\n",a+c,b+d);
printf("c1-c2=(%.2f,%.2fi)\n",a-c,b-d);
printf("c1*c2=(%.2f,%.2fi)\n",a*c-b*d,b*c+a*d);
printf("c1/c2=(%.2f,%.2fi)\n",(a*c+b*d)/(c*c+d*d),(b*c-a*d)/(c*c+d*d));
}参考答案（时间最优[0]）：
#include <iostream>
#include <iomanip>
using namespace std;
class Complex
{
public:
Complex();
Complex(double r,double i);
Complex operator+(Complex &c2);
Complex operator-(Complex &c2);
Complex operator*(Complex &c2);
Complex operator/(Complex &c2);
void display();
private:
double real;
double imag;
};
Complex::Complex()
{
}
Complex::Complex(double r,double i)
{
real=r;
imag=i;
}
Complex Complex::operator+(Complex &c2)
{
return Complex(real+c2.real,imag+c2.imag);
}
Complex Complex::operator-(Complex &c2)
{
return Complex(real-c2.real,imag-c2.imag);
}
Complex Complex::operator*(Complex &c2)
{
return Complex(real*c2.real-imag*c2.imag,real*c2.imag+c2.real*imag);
}
Complex Complex::operator/(Complex &c2)
{
return Complex((real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*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();
c3=c1-c2;
cout<<"c1-c2=";
c3.display();
c3=c1*c2;
cout<<"c1*c2=";
c3.display();
c3=c1/c2;
cout<<"c1/c2=";
c3.display();
return 0;
}
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