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  • 四则运算二

    一、设计思想

    在上个程序中添加控制变量,实现题目个数、数值范围、有无乘除法的控制。

    二、源程序代码

    #include<iostream>
    #include<cmath>
    using namespace std;
    void main()
    {
        int i, j, a, m, n, l, k, p, q, c,d,num/*,real*/;
        cout << "请输入题目的个数:" << endl;
        cin >> p;
        cout << "请选择题目类型: 1.有乘除法;2.无乘除法" << endl;
        cin >> q;
        cout << "请输入数值范围:" << endl;
        cin >> num;
        //cout << "请说明是否有括号:1.有;2.无" << endl;
        //cin >> real;
        cout << endl;
        cout << endl;
        //if (real == 1)
        //{
            if (q == 1)
            {
                for (i = 0; i < p; i++)
                {
                    c = rand() % 9 + 1;
                    for (d = 0; d < c; d++)
                    {
                            l = rand() % (num);
                            k = l % 2;
                            if (k == 0)
                            {
                                m = rand() % (num);
                                n = rand() % (num);
                                if (m < n)
                                    cout << m << "/" << n;
                                if (m>n)
                                    cout << n << "/" << m;
                                if (m == n)
                                {
                                    if (m == 0)
                                        cout << m << "/" << ((rand() % num) + 20) / 2;
                                    else
                                        cout << m / 2 << "/" << n;
                                }
                            }
                            else
                            {
                                a = rand() % (num)+1;
                                cout << a;
                            }
    
                            j = rand() % 4;
                            if (j == 0) cout << "  +  ";
                            else if (j == 1) cout << "  -  ";
                            else if (j == 2) cout << "  *  ";
                            else cout << "  /  ";
                        }
                    
    
                    l = rand() % (num);
                    k = l % 2;
                    if (k == 0)
                    {
                        m = rand() % (num);
                        n = rand() % (num);
                        if (m < n)
                            cout <<m<<"/"<<n;
                        if (m>n)
                            cout <<n<<"/"<<m;
                        if (m == n)
                        {
                            if (m == 0)
                                cout <<m<<"/"<<((rand() % num) + 20) / 2;
                            else
                                cout <<m / 2<<"/"<< n;
                        }
                    }
                    else
                    {
                        a = rand() % (num)+1;
                        cout << a;
                    }
                    cout << "  =" << endl;
    
                }
            }
            else
            {
                for (i = 0; i < p; i++)
                {
                    c = rand() % 9 + 1;
                    for (d = 0; d < c; d++)
                    {
                        l = rand() % (num);
                        k = l % 2;
                        if (k == 0)
                        {
                            m = rand() % (num);
                            n = rand() % (num);
                            if (m < n)
                                cout << m << "/" << n;
                            if (m>n)
                                cout << n << "/" << m;
                            if (m == n)
                            {
                                if (m == 0)
                                    cout << m << "/" << ((rand() % num) + 20) / 2;
                                else
                                    cout << m / 2 << "/" << n;
                            }
                        }
                        else
                        {
                            a = rand() % (num)+1;
                            cout << a;
                        }
    
                        j = rand() % 2;
                        if (j == 0) cout << "  +  ";
                        else if (j == 1) cout << "  -  ";
                    }
                    l = rand() % (num);
                    k = l % 2;
                    if (k == 0)
                    {
                        m = rand() % (num);
                        n = rand() % (100);
                        if (m < n)
                            cout << m << "/" << n;
                        if (m>n)
                            cout << n << "/" << m;
                        if (m == n)
                        {
                            if (m == 0)
                                cout << m << "/" << ((rand() % num) + 20) / 2;
                            else
                                cout << m / 2 << "/" << n;
                        }
                    }
                    else
                    {
                        a = rand() % (num)+1;
                        cout << a;
                    }
                    cout << "  =" << endl;
    
                }
            }
        //}
    }

    三、运行程序截图

    四、缺陷

    口号不知道怎么添加,加减法有无负数,乘除法有无余数不会弄

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  • 原文地址:https://www.cnblogs.com/lq897897/p/5269493.html
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