实验4

#include <iostream>
#include"graph.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main()
{
 Graph graph1('*',5);
 Graph graph2('$',7);//	定义类的对象graph以及graph2，并利用构造函数对其进行初始化
 graph1.draw();//引用函数draw完成绘图 
 graph2.draw(); 
 return 0 ;
} 
  	

#include"graph.h"
#include<iostream>
using namespace std;
Graph::Graph(char ch,int n):symbol(ch),size(n){}
void Graph::draw()//draw函数的实现 
{ 
  int i,j,n;
  for(i=0;i<size;i++)
  {
      n=2*size-1;//n为每行输出的字符数
       for(j=0;j<=n;j++)
       {
           if(j<size-i||j>size+i)
             cout<<" ";
           else
             cout<<symbol;
         }cout<<endl;         
  }
}

graph.h

#ifndef GRAPH_H
#define GRAPH_H
class Graph
{ 
   public:
    Graph(char ch,int n);   //构建构造函数 
    void draw();
   private:
       char symbol;
       int size;
};
#endi

 

 

fraction.h

class Fraction{
    public:
        Fraction(int t0,int b0);
        Fraction();
        Fraction(int t0);
        void add(Fraction &p1,Fraction &p2);
        void sub(Fraction &p1,Fraction &p2);
        void mul(Fraction &p1,Fraction &p2);
        void div(Fraction &p1,Fraction &p2);
        void compare(Fraction &p1,Fraction &p2);
        void show();
    private:
        int top;
        int bottom;
};

    

 

#include <iostream>
#include"fraction.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

#include <iostream>
#include"fraction.h"
using namespace std;
int main()  
{
    Fraction a;
    Fraction b(3,4);

#include<iostream>
#include"Fraction.h"
using namespace std;
//函数的实现
 Fraction::Fraction(){
     top=0;
     bottom=1;
 }
 Fraction::Fraction(int x,int y){
     top=x;
     bottom=y;
 }
 Fraction::Fraction(int x){
     top=x;
     bottom=1;
 }
 void Fraction::show()
{
 cout<<top<<'/'<<bottom<<endl;
}

void Fraction::add(Fraction &a,Fraction &b)
{ 
 
 a.top=top*b.bottom+b.top*bottom;
 a.bottom=bottom*b.bottom;
 a.show();
}

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

 a.top=top*b.bottom-b.top*bottom;
 a.bottom=bottom*b.bottom;
 a.show(); 
}
void Fraction::mul(Fraction &a,Fraction &b)
{

 a.top=top*b.top;
 a.bottom=bottom*b.bottom;
 a.show(); 
}
void Fraction::div(Fraction &a,Fraction &b)
{

 a.top=top*b.bottom;
 a.bottom=bottom*b.top; 
 a.show();
}
void Fraction::compare(Fraction &b,Fraction &c)
{
 double m,n;
 m=b.top/b.bottom;
 n=c.top/c.bottom;
 if(m<n)
 {
  cout <<b.top<<'/'<<b.bottom<<'<';c.show();cout<<endl;
 }
 else if(m==n)
 {
  cout <<b.top<<'/'<<b.bottom<<'=';c.show();cout<<endl;
 } 
 else
 {
  cout <<b.top<<'/'<<b.bottom<<'>';c.show();cout<<endl;
 }
}

    Fraction c(5);
    cout<<"a:",a.show();
    cout<<"b:",b.show();
    cout<<"c:",c.show(); 
    int x1,y1,x2,y2;
    cout<<"输入第一个分数的分子分母" <<endl;
    cin>>x1>>y1;
    Fraction a1(x1,y1); 
    cout<<"输入第二个分数的分子分母" <<endl;
    cin>>x2>>y2;
    Fraction a2(x2,y2); 
    a.add(a1,a2);
    cout<<"和：",a.show(); 
    a.sub(a1,a2);
    cout<<"差：",a.show();
    a.mul(a1,a2);
    cout<<"积：",a.show();
    a.div(a1,a2);
    cout<<"商：",a.show();
    a.compare(a1,a2);
    return 0;
}