实验三

part2：

#ifndef GRAPH_H
#define GRAPH_H

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

#endif

Graph.h

 

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

Graph.cpp

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

main.cpp

 

 part3

不会