实验三

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


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



void Graph::draw() {
    int i,j,k;
    for(int i=0;i<size;i++){
         for(int j=0;j<size-i;j++)
            cout<<" ";
         for(int k=0;k<2*i-1;k++)
            cout<<symbol;
        cout<<endl; 
    }
}

#ifndef GRAPH_H
#define GRAPH_H

class Graph {
    public:
        Graph(char ch, int n);   
        void draw();   
    private:
        char symbol;
        int size;
};


#endif

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

void fraction::add(fraction x , fraction y){
    fraction s;
    s.high=x.high*y.low+y.high*x.low;
    s.low=x.low*y.low;
    cout<<"x+y="<<s.high<<"/"<<s.low<<endl;
}

void fraction::min(fraction x , fraction y){
    fraction s;
    s.high=x.high*y.low-y.high*x.low;
    s.low=x.low*y.low;
    cout<<"x-y="<<s.high<<"/"<<s.low<<endl;
}

void fraction::mul(fraction x , fraction y){
    fraction s;
    s.high=x.high*y.high;
    s.low=x.low*y.low;
    cout<<"x*y="<<s.high<<"/"<<s.low<<endl;
}

void fraction::div(fraction x , fraction y){
    fraction s;
    s.high=x.high*y.low;
    s.low=x.low*y.high;
    cout<<"x/y="<<s.high<<"/"<<s.low<<endl;
}

void fraction::compare(fraction x , fraction y){
    int s;
    s=x.high*y.low-y.high*x.low;
    if (s<0)
    cout<<"比较："<<x.high<<"/"<<x.low<<"<"<<y.high<<"/"<<y.low<<endl;
        else if (s>0)
        cout<<"比较："<<x.high<<"/"<<x.low<<">"<<y.high<<"/"<<y.low<<endl;
            else
            cout<<"比较："<<x.high<<"/"<<x.low<<"="<<y.high<<"/"<<y.low<<endl;
}

void fraction::show(){
    cout<<high<<"/"<<low<<endl;
}

#ifndef FRACTION_H
#define FRACTION_H
class fraction{
    public:
        fraction(int x = 0 , int y = 1):high(x),low(y){}
        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 high;
        int low;
};

#endif

#include<iostream>
#include"Fraction.h"
using namespace std;
int main(){
    fraction a;
    a.show();
    fraction b(5,2);
    b.show();
    fraction c(7,3);
    c.show();
    fraction s;
    s.add(b,c);
    s.min(b,c);
    s.mul(b,c);
    s.div(b,c);
    s.compare(b,c);
}