Fan类与Rational类的简单实现

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问题描述

设计一个Fan风扇类，要求如下：

设计一个Rational有理数类，要求如下：

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问题分析

Fan设计：

Rational设计：

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源代码

Fan：

//main.cpp
#include <iostream>
#include<string>
#include "Fan.h"

using namespace std;

int main()
{
    Fan a;
    cout << "before:" << endl;
    cout << a.status() << endl;
    cout << "after:" << endl;
    a.setColor("black");
    a.setSpeed(3);
    a.setOn(true);
    cout << a.status() << endl;
    cout << "***************" << endl;
    Fan b(2,true,4.0,"blue");
    cout << b.status() << endl;
    cout << "***************" << endl;
    Fan c(3,false,1.0,"red");
    cout << c.status() << endl;
    cout << "***************" << endl;
    return 0;
}

//Fan.h
#include <string>

using namespace std;

class Fan{
    public:
        int SLOW = 1;
        int MEDIUM = 2;
        int FAST = 3;
        Fan();
        Fan(int s,bool o,double r,string c);
        int getSpeed();
        void setSpeed(int s);
        bool getOn();
        void setOn(bool o);
        double getRadius();
        string getColor();
        void setColor(string str);
        string status();
    private:
        int speed = 1;
        bool on = false;
        double radius = 5.0;
        string color = "white";

};

//Fan.cpp
#include <iostream>
#include <string>
#include "Fan.h"
using namespace std;

Fan ::Fan(){}

Fan ::Fan(int s,bool o,double r,string c){
    SLOW = 1;
    MEDIUM = 2;
    FAST = 3;
    speed = s;
    on = o;
    radius = r;
    color = c;
}

int Fan ::getSpeed(){
    return speed;
}

void Fan ::setSpeed(int s){
    speed = s;
}

bool Fan ::getOn(){
    return on;
}

void Fan ::setOn(bool o){
    on = o;
}

double Fan ::getRadius(){
    return radius;
}

string Fan ::getColor(){
    return color;
}

void Fan ::setColor(string str){
    color = str;
}

string Fan ::status(){
    string str = "";
    if(on){
            str = "speed: ";
        if(speed == 1)
            str += "SLOW ";
        else if(speed == 2)
            str += "MEDIUM ";
        else
            str += "FAST ";
        str += "color: " + color + " radius: " + to_string(radius);
    }

    else{
        str += "status: off  color: " + color + " radius: " +to_string(radius);
    }

    return str;
}

Rational：

//main.cpp
#include <iostream>
#include "Rational.h"

using namespace std;

int main()
{

    double x = 25.12;
    Rational a(25,32);
    a = a.transform_double(x);
    a.output_Rational();


    return 0;
}

//Rational.h

using namespace std;

class Rational{
    public:
        int x;
        int y;
        Rational();
        Rational(int a,int b);
        void setRational(int a,int b);
        void easeRational();
        Rational sum(Rational s);
        Rational reduce(Rational r);
        Rational multply(Rational m);
        Rational divorce(Rational d);
        void output_Rational();
        Rational transform_double(double t);
};

//Rational.cpp
#include <iostream>
#include <math.h>
#include "Rational.h"

using namespace std;

Rational::Rational(){
    x = 0;
    y = 1;
}

Rational::Rational(int a,int b){
    if(!b){
        cout << "分母不能为零  已按照默认数值初始化！" << endl;
        x = 0;
        y = 1;
    }
    else{
        x = a;
        y =b;
    }
}

void Rational::setRational(int a,int b){
     if(!b){
        cout << "分母不能为零！" << endl;
    }
    else{
        x = a;
        y =b;
    }
}

void Rational::easeRational(){
    if(!x){
        y = 1;
    }
    else{
         int a = x > y ? x : y;
         int b = x < y ? x : y;

         while(a % b){
            int temp = b;
             b = a % b;
             a = temp;
         }

         x = x / b;
         y = y / b;
    }
}

Rational Rational::sum(Rational s){
    Rational ss((x*s.y + y*s.x),(y*s.y));
    ss.easeRational();
    return ss;
}

Rational Rational::reduce(Rational r){
    Rational rr((x*r.y - y*r.x),(y*r.y));
    rr.easeRational();
    return rr;
}

Rational Rational::multply(Rational m){
    Rational mm(x*m.x,y*m.y);
    mm.easeRational();
    return mm;
}

Rational Rational::divorce(Rational d){
    Rational dd((x*d.y),(y*d.x));
    dd.easeRational();
    return dd;
}

void Rational::output_Rational(){
    cout << x << "/" << y << endl;
}

Rational Rational::transform_double(double t){
    int p = 1000000;
    Rational re((int)(p*t),p);
    re.easeRational();
    return re;
}

测试：

Fan：

Rational：

读者可自行设计测试样例进行测试，这里不再赘述

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