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C++程序设计(第三版) 谭浩强 习题10.2 个人设计
习题 10.2 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。编程序,分别求两个复数之和、差、积和商。
代码块:
#include <iostream>
using namespace std;
class Complex
{
public:
Complex(){real=0; imag=0;} //默认构造函数
Complex(double r, double i){real=r; imag=i;} //构造函数
Complex operator+(Complex &); //定义重载运算符+函数
Complex operator-(Complex &); //定义重载运算符-函数
Complex operator*(Complex &); //定义重载运算符*函数
Complex operator/(Complex &); //定义重载运算符/函数
void display(); //定义成员函数display
private:
double real;
double imag;
};
//以下四个函数分别是重载+、-、*、/
Complex Complex::operator+(Complex &c)
{
return Complex(real+c.real, imag+c.imag);
}
Complex Complex::operator-(Complex &c)
{
return Complex(real-c.real, imag-c.imag);
}
Complex Complex::operator*(Complex &c)
{
return Complex(real*c.real, imag*c.imag);
}
Complex Complex::operator/(Complex &c)
{
return Complex(real/c.real, imag/c.imag);
}
//display函数
void Complex::display()
{
cout<<"("<<real;
if (imag>=0) cout<<"+";
cout<<imag<<"i)"<<endl;
}
int main()
{
Complex c1(4.4, 5), c2(4, -10), c3; //定义三个Complex对象c1,c2,c3,c1和c2有默认值
c3=c1+c2;
c3.display();
c3=c1-c2;
c3.display();
c3=c1*c2;
c3.display();
c3=c1/c2;
c3.display();
system("pause");
return 0;
}