随机生成30道四则运算题目

//四则运算，张莹荧
#include<iostream>
#include<stdlib.h>
#include<conio.h>
using namespace std;

void DealFenshu(int m, int a[][2])
{
    for (int p = 0; p<m; p++)
    {
        int i = (int)rand() % 100;
        int j = (int)rand() % 100;
        while (j == 0 || i >= j)
        {
            i = (int)rand() % 100;
            j = (int)rand() % 100;
        }
        int x = (int)rand() % 100;
        int y = (int)rand() % 100;
        while (y == 0 || x >= y)
        {
            x = (int)rand() % 100;
            y = (int)rand() % 100;
        }
        int k = (int)rand() % 100 / 25;
        switch (k)
        {
        case 0:
            cout << "(" << i << "/" << j << ")" << "+" << "(" << x << "/" << y << ")" << "=" << endl;
            a[p][0] = i*y + x*j;
            a[p][1] = j*y;
            break;
        case 1:
            cout << "(" << i << "/" << j << ")" << "-" << "(" << x << "/" << y << ")" << "=" << endl;
            a[p][0] = i*y - x*j;
            a[p][1] = j*y;
            break;
        case 2:
            cout << "(" << i << "/" << j << ")" << "*" << "(" << x << "/" << y << ")" << "=" << endl;
            a[p][0] = i*x;
            a[p][1] = j*y;
            break;
        case 3:
            a[p][0] = i*y;
            a[p][1] = j*x;
            cout << "(" << i << "/" << j << ")" << "/" << "(" << x << "/" << y << ")" << "=" << endl;
        }
    }

}

void DealInt(int m, int a[])
{

    for (int p = 0; p<m; p++)
    {
        int i = (int)rand() % 100;
        int j = (int)rand() % 100;
        int k = (int)rand() % 100 / 25;
        switch (k)
        {
        case 0:
            cout << i << "＋" << j << "=" << endl;
            a[p] = i + j;
            break;
        case 1:
            cout << i << "－" << j << "=" << endl;
            a[p] = i - j;
            break;
        case 2:
            cout << i << "×" << j << "=" << endl;
            a[p] = i*j;
            break;
        case 3:
            try
            {
                a[p] = i / j;
                cout << i << "÷" << j << "=" << endl;
            }
            catch (...)
            {
                p--;
            }
        }

        
    }
}

void main()
{
    int p;
    do
    {
        system("cls");
        int a[1000], b[1000][2];
        int m, n;
        cout << "请输入生成的四则运算题个数：";
        cin >> m;
        cout << endl;
        cout << "请输入要生成的四则运算种类(输入1为整数，输入2为真分数):";
        cin >> n;
        cout << endl;
        if (n == 1)
        {
            DealInt(m, a);
            cout << endl;
        }
        else
        {
            DealFenshu(m, b);
            cout << endl;
        }
        cout << "是否继续生成运算题(生成请输入‘1’，否则输入‘0’)" << endl;
        cin >> p;
        cout << endl;
    } while (1 == p);
}