graph项目：

graph.h

#ifndef GRAPH_H#define GRAPH_Hclass Graph {    public:        Graph(char ch,int n);        void draw();    private:        char symbol;        int size;}; #endif

 

graph.cpp

#include "graph.h"#include 
     
      using namespace std;Graph::Graph(char ch,int n):symbol(ch),size(n){}void Graph::draw() {	int i,j;	for(i=1;i<=size;i++)	{for(j=1;j<=size-i;j++)	     cout<<" ";	 for(j=1;j<=2*i-1;j++)	     cout<
     

main.cpp

#include 
      
       #include "graph.h"using namespace std;int main() {    Graph graph1('*',5);    graph1.draw();        system("pause");    system("cls");        Graph graph2('$',7);    graph2.draw();        return 0;}
      

 

 

Fraction项目：

fraction.h

#ifndef FRACTION_H#define FRACTION_Hclass Fraction{    public:        Fraction(int top1=0,int bottom1=1):top(top1),bottom(bottom1) {        }        void add(Fraction a,Fraction b);        void min(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.cpp

#include "fraction.h"#include 
      
       using namespace std;void Fraction::add(Fraction a,Fraction b) {    Fraction sum;    sum.top=a.top*b.bottom+b.top*a.bottom;    sum.bottom=a.bottom*b.bottom;    cout<<"加："<
       
        <<"/"<
        
         <
         
          b.top)         cout<<"两数比较："<
          
           <<"/"<
           
            <<">"<
            
             <<"/"<
             
              <
              
               b.top) cout<<"两数比较："<
               
                <<"/"<
                
                 <<">"<
                 
                  <<"/"<
                  
                   <
                  
                 
                
               
              
             
            
           
          
         
        
       
      

main.cpp

#include 
      
       #include "Fraction.h"using namespace std;int main() {    Fraction a;    a.show();    Fraction b(3,4);    b.show();    Fraction c(5);    b.show();    Fraction example;    example.add(b,c);    example.min(b,c);    example.mul(b,c);    example.div(b,c);    example.compare(b,c);}
      

 

 实验总结与体会：

通过本次实验，我对类的应用更加熟练，但是part1中让小球左右移动还是不知道如何编写，在改变x和y的坐标的过程中遇到瓶颈，看了同学的程序还是不明白如何实现。

part3中将分数最简化也还未做到，我会再尝试一下的。