实验6 类的继承和多态

Posted 2020-11-12 jiahewang

四、实验结论

1.实验内容1

Base.h

#ifndef Base_h
#define Base_h
using namespace std;
class Base {
public:
    Base (int m0 ,int n0):m(m0),n(n0){}
    int add (){return m+n;};
    int getm() const {return m;};
    int getn() const {return n;};
private:
    int m, n;
};
#endif /*Base_h*/

A.h

#ifndef A_h
#define A_h
#include "Base.h"
class A:public Base {
public:
    A (int m0, int n0):Base(m0,n0){};
    int sub(){ return getm()-getn(); };
};
#endif /* A_h */

B.h

#ifndef B_h
#define B_h
#include "Base.h"
class B:public Base{
public:
    B(int m0, int n0): Base(m0,n0){};
    int mul(){ return getm()*getn(); };
};
#endif /* B_h */

C.h

#ifndef C_h
#define C_h
#include "Base.h"
class C : public Base{
public:
    C(int m0, int n0):Base(m0,n0){};
    int div(){ return getm()/getn(); };
};
#endif /* C_h */

main.cpp

#include <iostream>
#include <cmath>
#include "A.h"
#include "B.h"
#include "C.h"
using namespace std;
int main() {
    int m,n;
    cin>>m>>n;
    A a(m,n);
    cout<<"m+n="<<a.add()<<endl;
    cout<<"m-n="<<a.sub()<<endl;
    cin>>m>>n;
    B b(m,n);
    cout<<"m+n="<<b.add()<<endl;
    cout<<"m*n="<<b.mul()<<endl;
    cin>>m>>n;
    C c(m,n);
    cout<<"m+n="<<c.add()<<endl;
    cout<<"m/n="<<c.div()<<endl;  
    return 0;
}

• Xcode下运行截图
  

2.实验内容2

vehicle.h

#ifndef vehicle_h
#define vehicle_h
using namespace std;
class vehicle{
private:
    int maxspeed;
    int weight;
public:
    vehicle(int x ,int y):maxspeed(x),weight(y){}
    ~vehicle(){cout<<"destructing vehicle..."<<endl;};
    int getmaxspeed()const{ return maxspeed; };
    int getweight() const { return weight; };
    void run(){cout<<"run"<<endl;};
    void stop(){cout<<"stop"<<endl;};
};
#endif /* vehicle_h */

bicycle.h

#ifndef bicycle_h
#define bicycle_h
#include "vehicle.h"
class bicycle:virtual public vehicle{
private:
    int height;
public:
    bicycle(int x,int y, int z ):vehicle(x,y),height(z){};
    ~bicycle(){cout<<"destructing bicycle..."<<endl;};
    int getheight() const { return height;};
};
#endif /* bicycle_h */

motorcar.h

#ifndef motorcar_h
#define motorcar_h
#include "vehicle.h"
class motorcar:virtual vehicle{
private:
    int seatnum;
public:
    motorcar(int x,int y,int s):vehicle(x,y),seatnum(s){};
    ~motorcar(){cout<<"destructing motorcar..."<<endl;};
    int getseatnum() const { return seatnum;};
};
#endif /* motorcar_h */

motorcycle.h

#ifndef motorcycle_h
#define motorcycle_h
#include "bicycle.h"
#include "motorcar.h"
class motorcycle:public bicycle,public motorcar{
public:
    motorcycle(int x,int y,int z,int s):bicycle(x,y,z),motorcar(x,y,s),vehicle(x,y){};
    ~motorcycle(){cout<<"destructing motorcycle..."<<endl;};
};
#endif /* motorcycle_h */

main.cpp

#include <iostream>
#include "motorcycle.h"
using namespace std;
int main() {
    motorcycle A(12,10,8,13);
    cout<<"maxspeed="<<A.getmaxspeed()<<endl;
    cout<<"weight="<<A.getweight()<<endl;
    cout<<"height="<<A.getheight()<<endl;
    cout<<"seatnum="<<A.getseatnum()<<endl;
    A.run();
    A.stop();
    return 0;
}

• Xcode 下运行截图：
  

3.实验内容3

Fraction.h

#ifndef Fraction_h
#define Fraction_h
class Fraction {
public:
    Fraction():top(0),bottom(1){};            //构造函数
    Fraction(int t, int b):top(t),bottom(b){}; //构造函数的重载
    Fraction(int t):top(t),bottom(1){};     //构造函数的重载
    
    //运算符重载成员函数
    Fraction operator +(const Fraction &f0) const;
    Fraction operator -(const Fraction &f0) const;
    Fraction operator *(const Fraction &f0) const;
    Fraction operator /(const Fraction &f0) const;
    void show() const;
    int gettop(){ return top; };
    int getbottom(){ return bottom; };
    
private:
    int top;       //分子
    int bottom;    //分母
};
#endif /* Fraction_h */

Fraction.cpp

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

//重载运算符函数的实现
Fraction Fraction::operator+(const Fraction &f0) const{
    Fraction f;
    f.top=top*f0.bottom+bottom*f0.top;
    f.bottom=bottom*f0.bottom;
    return f;
}

Fraction Fraction::operator-(const Fraction &f0) const{
    Fraction f;
    f.top=top*f0.bottom-bottom*f0.top;
    f.bottom=bottom*f0.bottom;
    return f;
}

Fraction Fraction::operator*(const Fraction &f0) const{
    Fraction f;
    f.top=top*f0.top;
    f.bottom=bottom*f0.bottom;
    return f;
}

Fraction Fraction::operator/(const Fraction &f0) const{
    Fraction f;
    f.top=top*f0.bottom;
    f.bottom=bottom*f0.top;
    return f;
}

//输出函数的实现
void Fraction::show() const {
    cout<<top<<"/"<<bottom<<endl;
}

iFraction.h

#ifndef iFraction_h
#define iFraction_h
#include "Fraction.h"
class iFraction:public Fraction{
public:
    //为派生类 iFraction 定义构造函数，实现 iFraction 对象的初始化
    iFraction():Fraction(0,1),real(0){};
    iFraction(int t, int b,int a):Fraction(t,b),real(0){};
    iFraction(int t):Fraction(t,1),real(0){};
    
    void prinf();
    int getreal(){ return real;};
    
    //convertF（）用于对 iFraction类对象进行规范化处理
    friend void convertF(iFraction &f);
    
private:
    int real;
};
#endif /* iFraction_h */

iFraction.cpp

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

void iFraction::prinf(){
    cout<<gettop()<<endl;
    cout<<"--"<<endl;
    cout<<getbottom()<<endl;
}

void convertF(iFraction &f){
    int t, b, r;
    t=f.gettop();
    b=f.getbottom();
    r=f.getreal();
    if(t>b){
        r=t/b;
        t=t%b;
    }
    cout<<"  "<<t<<endl;
    cout<<r<<"---"<<endl;
    cout<<"  "<<b<<endl;
}

main.cpp

#include <iostream>
#include "iFraction.h"
#include <cmath>
using namespace std;
int main() {
    Fraction a(5,6);
    cout<<"a=";
    a.show();
    Fraction b(3);
    cout<<"b=";
    b.show();
    Fraction c;

    c=a+b;
    cout<<"a+b=";
    c.show();
    
    c=a-b;
    cout<<"a-b=";
    c.show();
    
    c=a*b;
    cout<<"a*b=";
    c.show();
    
    c=a/b;
    cout<<"a/b=";
    c.show();
   
    
    iFraction x(5,3,0);
    x.prinf();
    cout<<"可化为真分数："<<endl;
    convertF(x);
    return 0;
}

• Xcode下运行截图