C++类与对象问题

Question

#include<iostream>#include <math.h>using namespace std;enum CPU_Rank{p1=1,p2,p3,p4,p5,p6,p7};class CPU{private: CPU_Rank rank; int frequency; float voltage;public: CPU(CPU_Rank r, int f, float v) { rank = r; frequency = f; voltage = v; cout << "构造了一个CPU！" << endl; } ~CPU() { cout << "析构了一个CPU！" << endl; } CPU_Rank getRank()const { return rank; } int getFrequency()const { return frequency; } float getVoltage()const { return voltage; } void setRank(CPU_Rank r){ rank = r;} void setFrequency(int f) { frequency = f;} void setVoltage(float v) { voltage = v; } void Run() { cout << "CPU开始运行！" << endl; } void Stop() { cout << "CPU停止运行！" << endl; }};class point {private: int x, y;public: point(int xx = 0, int yy = 0) :x(xx), y(yy) {} point(point &t) :x(t.x), y(t.y) { cout << "复制构造函数被调用" << endl; } ~point() {} int getx() {} int gety() {} void show();};void point::show() { cout << "x=" <<x << "y=" << y << endl;}class point1{private: int i_x; int i_y; int i_z;public: point1(); point1(int x, int y, int z); point1(point1 &pt); ~point1(); int getx(); int gety(); int getz();};point1::point1(){ cout << "调用无参构造函数，输入点坐标:\n"; cin >> i_x >> i_y >> i_z;}point1::point1(int x, int y, int z){ cout << "调用有参构造函数\n"; i_x = x; i_y = y; i_z = z;}point1::point1(point1 &pt){ cout << "调用复制构造函数\n"; i_x = pt.i_x; i_y = pt.i_y; i_z = pt.i_z;}point1::~point1(){ cout << "调用析构函数！\n"; }point1::point1(){}int point1::getx() { return i_x; }int point1::gety() { return i_y; }int point1::getz() { return i_z; }int main(){ CPU cpu(p6, 300, 2.8); cpu.Run(); cpu.Stop(); point a(1, 2); point b(a); a.show(); b.show(); cout << a.getx() <<": " << a.gety() << endl; double x, y, z, length; point1 p1; point1 p2(3, 4, 5); point1 p3(p1); x = p2.getx() - p3.getx(); y = p2.gety() - p3.gety(); z = p2.getz() - p3.getz(); length = sqrt(x*x + y*y + z*z); cout << "the length:" << length << endl; return 0;}

Answer 1

#include <iostream>
#include <math.h>
using namespace std;
enum CPU_Rank { p1 = 1, p2, p3, p4, p5, p6, p7 };
class CPU {
private: CPU_Rank    rank;
         int        frequency;
         float        voltage;
public: CPU(CPU_Rank r, int f, float v)
{
    rank = r;
    frequency = f;
    voltage = v;
    cout << "构造了一个CPU！" << endl;
}


        ~CPU()
        {
            cout << "析构了一个CPU！" << endl;
        }


        CPU_Rank getRank() const
        {
            return(rank);
        }


        int getFrequency() const
        {
            return(frequency);
        }


        float getVoltage() const
        {
            return(voltage);
        }


        void setRank(CPU_Rank r)
        {
            rank = r;
        }


        void setFrequency(int f)
        {
            frequency = f;
        }


        void setVoltage(float v)
        {
            voltage = v;
        }


        void Run()
        {
            cout << "CPU开始运行！" << endl;
        }


        void Stop()
        {
            cout << "CPU停止运行！" << endl;
        }
};
class point {
private: int x, y;
public: point(int xx = 0, int yy = 0) : x(xx), y(yy)
{
}


        point(point & t) : x(t.x), y(t.y)
        {
            cout << "复制构造函数被调用" << endl;
        }


        ~point()
        {
        }


        int getx()
        {
            return(x);
        }


        int gety()
        {
            return(y);
        }


        void show();
};
void point::show()
{
    cout << "x=" << x << "y=" << y << endl;
}


class point1 {
private: int    i_x;
         int    i_y;
         int    i_z;
public: point1();
        point1(int x, int y, int z);
        point1(point1 & pt);
        ~point1();
        int getx();


        int gety();


        int getz();
};
point1::point1()
{
    cout << "调用无参构造函数，输入点坐标:\n";
    cin >> i_x >> i_y >> i_z;
}


point1::point1(int x, int y, int z)
{
    cout << "调用有参构造函数\n"; i_x = x; i_y = y; i_z = z;
}


point1::point1(point1 &pt)
{
    cout << "调用复制构造函数\n";
    i_x = pt.i_x; i_y = pt.i_y; i_z = pt.i_z;
}


point1::~point1()
{
    cout << "调用析构函数！\n";
}


int point1::getx()
{
    return(i_x);
}


int point1::gety()
{
    return(i_y);
}


int point1::getz()
{
    return(i_z);
}


int main()
{
    CPU cpu(p6, 300, 2.8);


    cpu.Run();
    cpu.Stop();
    point a(1, 2);


    point b(a);


    a.show();
    b.show();
    cout << a.getx() << ": " << a.gety() << endl;
    double    x, y, z, length;
    point1    p1;
    point1 p2(3, 4, 5);


    point1 p3(p1);


    x = p2.getx() - p3.getx();
    y = p2.gety() - p3.gety();
    z = p2.getz() - p3.getz();
    length = sqrt(x * x + y * y + z * z);
    cout << "the length:" << length << endl; return(0);
}