C++ 实验六

#include<iostream>
using namespace std;

class ABC {
public:
    void abc(int x, int y){
        m = x;
        n = y;
    }
    void add() { cout << m + n << endl; }
private:
    int m, n;
};

class A :public ABC {
public:
    void a(int x, int y) {
        abc(x,y);
        m = x;
        n = y;
    }
    void minus() { cout << m - n << endl; };
private:
    int m, n;
};

class B :public ABC {
public:
    void b(int x, int y) {
        abc(x, y);
        m = x;
        n = y;
    }
    void mul() { cout << m * n << endl; };
private:
    int m, n;
};

class C :public ABC {
public:
    void c(int x, int y) {
        abc(x, y);
        m = x;
        n = y;
    }
    void divide() { cout << m / n << endl; };
private:
    int m, n;
};

int main() {
    int a, b;
    cin >> a >> b;
    cout << "A" << endl;
    A t1;
    t1.a(a, b);
    t1.add();
    t1.minus();
    cout << "B" << endl;
    B t2;
    t2.b(a, b);
    t2.add();
    t2.mul();
    cout << "C" << endl;
    C t3;
    t3.c(a, b);
    t3.add();
    t3.divide();
    system("pause");
    return 0;
}

#include<iostream>
using namespace std;

class vehicle{
public:
    vehicle(int x, int y):maxspeed(x),weight(y){};
    void run() { cout << "run" << endl; };
    void stop() { cout << "stop" << endl; };
    virtual ~vehicle() { cout << "Deleting..." << endl; };
protected:
    int maxspeed, weight;
};

class bicycle:virtual public vehicle{
public:
    bicycle(int x, int y, int z):vehicle(x,y), height(z){};
    virtual ~bicycle() { cout << "Deleting..." << endl; };
protected:
    int height;
};

class motorcar:virtual public vehicle{
public:
    motorcar(int x, int y, int s) :vehicle(x, y), seatnum(s) {};
    virtual ~motorcar() { cout << "Deleting..." << endl; };
protected:
    int seatnum;
};

class motorcycle:public bicycle ,public motorcar {
public:
    motorcycle(int x, int y, int z, int s) :vehicle(x, y), bicycle(x,y,z),motorcar(x,y,s){};
    virtual ~motorcycle() { cout << "Deleting..." << endl; };
};

int main() {
    cout<<"vehicle:"<<endl;
    vehicle a(200,20);
    a.run();
    a.stop();
    cout << "bicycle:" << endl;
    bicycle b(200,20,1);
    b.run();
    b.stop();
    cout << "motorcar:" << endl;
    motorcar c(200,20,8);
    c.run();
    c.stop();
    cout << "motorcycle:" << endl;
    motorcycle d(200,20,1,8);
    d.run();
    d.stop();
    return 0;    
}

#ifndef _FRACTION_H_
#define _FRACTION_H_
#include<iostream>
using namespace std;

class Fraction {
public:
    Fraction(int t, int b);
    Fraction(int t);
    Fraction() {
        top = 0;
        bottom = 1;
    }
    void show() { cout << top << "/" << bottom << endl; };
    Fraction operator+(const Fraction &b)const;
    Fraction operator-(const Fraction &b)const;
    Fraction operator*(const Fraction &b)const;
    Fraction operator/(const Fraction &b)const;
    void com(Fraction x);

private:
    int top;
    int bottom;
};

#endif 

#include "Fraction.h"
#include <iostream>
using namespace std;


Fraction::Fraction(int t, int b) :top(t), bottom(b) {}

Fraction::Fraction(int t) : top(t), bottom(1) {}

Fraction Fraction::operator+(const Fraction &b)const{
    return Fraction(top * b.bottom + b.top*bottom, bottom * b.bottom);
}

Fraction Fraction::operator-(const Fraction &b)const{
    return Fraction(top * b.bottom - b.top*bottom, bottom * b.bottom);
}

Fraction Fraction::operator*(const Fraction &b)const{
    return Fraction(top * b.bottom, bottom * b.bottom);
}

Fraction Fraction::operator/(const Fraction &b)const{
    return Fraction(top * b.bottom, bottom * b.bottom);

}

void Fraction::com(Fraction x) {
    if (top*x.bottom > bottom*x.top)
        cout << top << "/" << bottom << ">" << x.top << "/" << x.bottom << endl;
    else cout << top << "/" << bottom << "<" << x.top << "/" << x.bottom << endl;
}

#include <iostream>
#include "Fraction.h"
using namespace std;

int main() {
    Fraction a(1,2),b(3, 4),c;
    c = a + b;
    cout << "c = a + b="; c.show();
    c = a - b;
    cout << "c = a - b="; c.show();
    c = a * b;
    cout << "c = a * b="; c.show();
    c = a / b;
    cout << "c = a / b="; c.show();
    system("pause");
    return 0;
}

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