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

#include "graph.h"
#include <iostream>
using namespace std;
// 带参数的构造函数的实现
Graph::Graph(char ch, int n) : symbol(ch), size(n) {
}
// 成员函数draw()的实现
// 功能：绘制size行，显示字符为symbol的指定图形样式
void Graph::draw() {int i, j, k;for (i = 0;i < size;i++){for (j = 0;j < size - 1 - i;j++)cout << " ";for (k = 0;k < 2 * i + 1;k++)cout << symbol;cout << endl;}
}

#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;
}

#ifndef FRACTION_H
#define FRACTION_Hclass Fraction {
public:Fraction(int t = 0, int b = 1) : top(t), bottom(b) {}Fraction(const Fraction &fr) : top(fr.top), bottom(fr.bottom) {}void fractionadd(Fraction &f, Fraction &p);void fractionmin(Fraction &f, Fraction &p);void fractionmul(Fraction &f, Fraction &p);void fractiondiv(Fraction &f, Fraction &p);void fractioncom(Fraction &f, Fraction &p);void show();
private:int top;int bottom;
};
#endif // !FRACTION_H#pragma once

#include"fraction.h"
#include<iostream>
using namespace std;
void Fraction::show() {if (top == 0) cout << 0 << endl;else if (bottom == 1) cout << top << endl;else if (top / bottom < 0) cout << "-" << top << "/" << bottom << endl;else cout << top << "/" << bottom << endl;
}void Fraction::fractionadd(Fraction &f, Fraction &p) {int t1, b1, t2, b2, m, n, temp, x, y, z;t1 = f.top;t2 = p.top;b1 = f.bottom;b2 = p.bottom;y = b1 * b2;x = t1 * b2 + t2 * b1;m = x;n = y;if (m < n){temp = m;m = n;n = temp;}for (z = n;z >= 1;z--){if (x%z == 0 && y%z == 0) break;}x = x / z;y = y / z;cout << x << "/" << y << endl;
}void Fraction::fractionmin(Fraction &f, Fraction &p) {int t1, t2, b1, b2, x, y, m, n, temp, z;t1 = f.top;t2 = p.top;b1 = f.bottom;b2 = p.bottom;y = b1 * b2;x = t1 * b2 - t2 * b1;m = x;n = y;if (m < n){temp = m;m = n;n = temp;}for (z = n; z >= 1; z--){if (x%z == 0 && y%z == 0) break;}x = x / z;y = y / z;cout << x << "/" << y << endl;
}void Fraction::fractionmul(Fraction &f, Fraction &p) {int t1, t2, b1, b2, x, y, m, n, temp, z;t1 = f.top;t2 = p.top;b1 = f.bottom;b2 = p.bottom;y = b1 * b2;x = t1 * t2;m = x;n = y;if (m < n){temp = m;m = n;n = temp;}for (z = n; z >= 1; z--){if (x%z == 0 && y%z == 0) break;}x = x / z;y = y / z;cout << x << "/" << y << endl;
}void Fraction::fractiondiv(Fraction &f, Fraction &p) {int t1, t2, b1, b2, x, y, m, n, temp, z;t1 = f.top;t2 = p.bottom;b1 = f.bottom;b2 = p.top;y = b1 * b2;x = t1 * t2;m = x;n = y;if (m < n){temp = m;m = n;n = temp;}for (z = n; z >= 1; z--){if (x%z == 0 && y%z == 0) break;}x = x / z;y = y / z;cout << x << "/" << y << endl;
}void Fraction::fractioncom(Fraction &f, Fraction &p) {int t1, t2, b1, b2, x, y;t1 = f.top;t2 = p.top;b1 = f.bottom;b2 = p.bottom;y = b1 * b2;x = t1 * b2 - t2 * b1;if (x < 0) cout << f.top << "/" << f.bottom << "<" << p.top << "/" << p.bottom << endl;else if (x > 0) cout << f.top << "/" << f.bottom << ">" << p.top << "/" << p.bottom << endl;else if (x == 0) cout << f.top << "/" << f.bottom << "=" << p.top << "/" << p.bottom << endl;
}

#include"fraction.h"
#include<iostream>
using namespace std;
int main() {Fraction a;a.show();Fraction b(3, 4);b.show();Fraction c(5);c.show();int x, y;cin >> x >> y;Fraction d(x, y);d.show();a.fractionadd(b, d);a.fractionmin(b, d);a.fractionmul(b, d);a.fractiondiv(b, d);a.fractioncom(b, d);system("pause");
}