实验4

实验结论

实验内容2

graph.h

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

graph.cpp

#include "graph.h" 
#include <iostream>
using namespace std;
Graph::Graph(char ch, int t): symbol(ch), size(t) {
}
void Graph::draw() {
int i,j,k;
    for(i=1;i<=size;i++)
    {
        for(k=size-i;k>=0;k--)
        {
            cout<<" ";
        }
        for(j=0;j<2*i-1;j++)
        {
            if(j<2*i-2)
                cout<<symbol;
            if(j==2*i-2)
                cout<<symbol<<endl;
        }
    }
}

main.cpp

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

实验内容3

fraction.h

#ifndef FRACTION_H
#define FRACTION_H
class Fraction
{
public:
    Fraction(int t0,int b0);
    Fraction(int t0);
    Fraction();
    ~Fraction();
    void add(Fraction &f1);
    void subtract(Fraction &f);
    void multiply(Fraction &f);
    void divide(Fraction &f);
    void compare(Fraction &f);
    void input();
    void output();

private:
    int top;
    int bottom;
};
#endif

fraction.cpp

using namespace std;

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


Fraction::Fraction(int t):top(t)
{
    bottom = 1;
}
Fraction::Fraction()
{
    top = 0;
    bottom = 1;
}

Fraction::~Fraction(){
}

void Fraction::add(Fraction &f)            //加
{
    cout << top * f.bottom + f.top * bottom
        << "/" << bottom * f.bottom << endl;
}

void Fraction::subtract(Fraction &f)       //减
{
    cout << top * f.bottom - f.top * bottom
        << "/" << bottom * f.bottom << endl;
}

void Fraction::multiply(Fraction &f)       //乘
{
    cout << top * f.top << "/"
        << bottom * f.bottom << endl;
}

void Fraction::divide(Fraction &f)     //除
{
    cout << top * f.bottom << "/"
        << bottom * f.top << endl;
}

void Fraction::compare(Fraction &f)        //比较大小
{
    if (top * f.bottom > bottom * f.top)
        cout << top << "/" << bottom << endl;
    else if (top * f.bottom < bottom * f.top)
        cout << f.top << "/" << f.bottom << endl;
    else if (top * f.bottom == bottom * f.top)
        cout << "一样大" << endl;
}

void Fraction::input()
{
    cin >> top >> bottom;
}
void Fraction::output()
{
    cout << top << "/" << bottom << endl;
}

main.cpp

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

int main()
{
    Fraction a;
    Fraction b(3,4);
    Fraction c(5);
    cout << "a为：";    a.output();
    cout << "b为：";    b.output();
    cout << "c为：";    c.output();
     cout << "加减乘除比较" << endl;
    cout << "a + b = ";     a.add(b);
    cout << "a - b = ";     a.subtract(b);
    cout << "b * c = ";     b.multiply(c);
    cout << "b / c = ";     b.divide(c);
    cout << "a和b比较，较大者为：";    a.compare(b);
    cout << "c和c比较：";       c.compare(c);
    cout << "输入a：";
    a.input();
    cout << "a为："; 
    a.output();
    return 0;
}

 

实验总结与体会

c++的学习很困难，需要花时间钻研