C++习题 复数类--重载运算符3+

C++习题 复数类--重载运算符3+

时间: 1ms        内存:128M

描述:

请编写程序,处理一个复数与一个double数相加的运算,结果存放在一个double型的变量d1中,输出d1的值,再以复数形式输出此值。定义Complex(复数)类,在成员函数中包含重载类型转换运算符:
operator double() { return real; }

输入:

一个复数与一个double数

输出:

d1的值和复数形式的此值

示例输入:

3 4
2.5

示例输出:

d1=5.50
c2=(5.50, 0.00)

提示:

参考答案(内存最优[1268]):


#include <iostream>
#include <iomanip>
using namespace std;
class Complex
{
public:
    Complex();
    Complex(double r);
    Complex(double r,double i);
    operator double();
    void display();
private:
    double real;
    double imag;
};
Complex::Complex()
{
    real=0;
    imag=0;
}
Complex::Complex(double r)
{
    real=r;
    imag=0;
}
Complex::Complex(double r,double i)
{
    real=r;
    imag=i;
}
Complex::operator double()
{
    return real;
}

void Complex::display()
{
    cout<<"("<<real<<", "<<imag<<")"<<endl;
}

int main()
{
    cout<<setiosflags(ios::fixed);
    cout<<setprecision(2);
    double real,imag;
    cin>>real>>imag;
    Complex c1(real,imag);
    double d1;
    cin>>d1;
    d1=d1+c1;
    cout<<"d1="<<d1<<endl;
    Complex c2=Complex(d1);
    cout<<"c2=";
    c2.display();
    return 0;
}

参考答案(时间最优[0]):


#include <iostream>
#include <iomanip>
using namespace std;
class Complex
{
public:
    Complex();
    Complex(double r);
    Complex(double r,double i);
    operator double();
    void display();
private:
    double real;
    double imag;
};
Complex::Complex(double r)
{
    imag=0;
    real=r;
}
Complex::Complex(double r,double i)
{
    imag=i;
    real=r;
}
Complex::operator double()
{
    return real;
}
void Complex::display()
{
    cout<<'('<<real<<", "<<imag<<')'<<endl;
}

int main()
{
    cout<<setiosflags(ios::fixed);
    cout<<setprecision(2);
    double real,imag;
    cin>>real>>imag;
    Complex c1(real,imag);
    double d1;
    cin>>d1;
    d1=d1+c1;
    cout<<"d1="<<d1<<endl;
    Complex c2=Complex(d1);
    cout<<"c2=";
    c2.display();
    return 0;
}

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