c++实验3类和对象

实验 3:

part 1：验证

part 2：graph

#include <iostream>

#include "graph.h"

using namespace std;

int main() {

    Graph graph1('*',);

    graph1.draw();

    system("pause");

    system("cls");

    Graph graph2('$',);

    graph2.draw();

    system("pause");

    return ;

}

main.cpp

// 类graph的实现

#include "graph.h"

#include <iostream>

using namespace std;

// 带参数的构造函数的实现

Graph::Graph(char ch, int n): symbol(ch), size(n) {

}

// 成员函数draw()的实现

// 功能：绘制size行，显示字符为symbol的指定图形样式

void Graph::draw() {

 for(int i=;i<=size;i++)

 {for(int j=;j<=size-i;j++)

     cout<<" ";

  for(int k=;k<*i-;k++)

     cout<<symbol;

  cout<<endl;

 }

}

graph.cpp

#ifndef GRAPH_H

#define GRAPH_H

// 类Graph的声明

class Graph {

    public:

        Graph(char ch, int n);   // 带有参数的构造函数

        void draw();     // 绘制图形

    private:

        char symbol;

        int size;

};

#endif

graph.h

运行结果：

part 3：分数的加减乘除

#ifndef Fraction_H

#define Fraction_H

// 类Fraction的声明

class Fraction {

    public:

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

        }// 带有参数的构造函数

        void add(Fraction a, Fraction b);

        void sub(Fraction a, Fraction b);

        void mul(Fraction a, Fraction b);

        void div(Fraction a, Fraction b);

        void compare(Fraction a, Fraction b);

        void show();

    private:

        int top;

        int bottom;

};

#endif

fraction.h

#include <iostream>

#include "fraction.h"

using namespace std;

int main()

{int x,y,m,n;

 Fraction a;

 a.show();

 Fraction b(,);

 b.show();

 Fraction c();

 c.show();

 cout<<"Input two score: "<<endl;

 cin>>x>>y;

 cin>>m>>n;

 while(y==||n==)

   {cout<<"ERROR!Please try again!"<<endl;

    cin>>x>>y;

    cin>>m>>n;

   }

 Fraction d(x,y);

 Fraction e(m,n);

 a.add(d,e);

 a.sub(d,e);

 a.mul(d,e);

 a.div(d,e);

 a.compare(d,e);

 return ;

}

main.cpp

#include"fraction.h"

#include<iostream>

using namespace std;

void Fraction::show(){

    if (top == ) cout << <<endl;

    else if (bottom == ) cout << top << endl;

    else cout << top << "/" << bottom << endl;

}

void Fraction::add(Fraction a, Fraction b){

    int gbs,m=a.bottom,n=b.bottom,t,r,fz,fm;

    if(m<n)

    {t=m;m=n;n=t;}

    r=m%n;

    while(r!=)

    {m=n;n=r;r=m%n;}

    gbs=a.bottom*b.bottom/n;

    fz=a.top*(gbs/a.bottom)+b.top*(gbs/b.bottom);

    fm=gbs;

    cout<<"add: "<<fz<<"/"<<fm<<endl;

}

void Fraction::sub(Fraction a, Fraction b){

    int gbs,m=a.bottom,n=b.bottom,t,r,fz,fm;

    if(m<n)

    {t=m;m=n;n=t;}

    r=m%n;

    while(r!=)

    {m=n;n=r;r=m%n;}

    gbs=a.bottom*b.bottom/n;

    fz=a.top*(gbs/a.bottom)-b.top*(gbs/b.bottom);

    fm=gbs;

    cout<<"sub: "<<fz<<"/"<<fm<<endl;

}

void Fraction::mul(Fraction a, Fraction b){

    int fz,fm;

    fz=a.top*b.top;

    fm=a.bottom*b.bottom;

    cout<<"mul: "<<fz<<"/"<<fm<<endl;

}

void Fraction::div(Fraction a, Fraction b){

    int fz,fm;

    fz=a.top*b.bottom;

    fm=b.top*a.bottom;

    cout<<"div: "<<fz<<"/"<<fm<<endl;

}

void Fraction::compare(Fraction a, Fraction b){

    int gbs,m=a.bottom,n=b.bottom,t,r,fz,fm;

    if(m<n)

    {t=m;m=n;n=t;}

    r=m%n;

    while(r!=)

    {m=n;n=r;r=m%n;}

    gbs=a.bottom*b.bottom/n;

    fz=a.top*(gbs/a.bottom)-b.top*(gbs/b.bottom);

    if(fz<)

      cout<<"compare: "<<a.top<<"/"<<a.bottom<<"<"<<b.top<<"/"<<b.bottom<<endl;

    else if(fz>)

            cout<<"compare: "<<a.top<<"/"<<a.bottom<<">"<<b.top<<"/"<<b.bottom<<endl;

         else

            cout<<"compare: "<<a.top<<"/"<<a.bottom<<"="<<b.top<<"/"<<b.bottom<<endl;

}

fraction.cpp

运行结果：

总结：

1、part3中有许多代码是重复的，目前还想不到好的解决方案。

2、在做题时，还是会翻阅书，参考样例，不够熟练。

3、学习了用项目。

评论：

1、https://www.cnblogs.com/shenqidetao/p/10742384.html

2、https://www.cnblogs.com/qsxsc/p/10742704.html

3、https://www.cnblogs.com/csc13813017371/p/10743961.html

巴特西

c++实验3类和对象

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