基于控制台的四则运算

 coding地址：https://git.coding.net/Dialect/c-sizeyunsuan.git

题目要求

1. 除了整数以外，还要支持真分数的四则运算，真分数的运算，例如：1/6 + 1/8 = 7/24
2. 运算符为 +, −, ×, ÷
3. 并且要求能处理用户的输入，并判断对错，打分统计正确率。
4. 要求能处理用户输入的真分数， 如 1/2, 5/12 等
5. 使用 -n 参数控制生成题目的个数，例如执行下面命令将生成10个题目

部分代码展示

void DealInt(int n, int a[])
{
    srand(time(NULL));
    for (int p = 0; p<n; p++)
    {
        int i = (int)rand() % 10;
        int j = (int)rand() % 10;
        int k = (int)rand() % 100 / 25;
        switch (k)
        {
        case 0:
            cout << i << "+" << j << "=";
            a[p] = i + j;
            check2(n, a);
            break;
        case 1:
            cout << i << "-" << j << "=";
            a[p] = i - j;
            check2(n, a);
            break;
        case 2:
            cout << i << "*" << j << "=";
            a[p] = i*j;
            check2(n, a);
            break;
        case 3:
            try
            {
                a[p] = i / j;
                cout << i << "/" << j << "=";
                check2(n, a);
            }
            catch (...)
            {
                p--;
            }


        }

    }
    float t = (float)r / (float)n;
    cout << "正确率:" << 100 * t << "%" << endl;
}

void DealFenshu(int n, int a[][2])
{
    srand(time(NULL));
    for (int p = 0; p<n; p++)
    {
        int i = (int)rand() % 10;
        int j = (int)rand() % 10;
        while (j == 0 || i >= j)
        {
            i = (int)rand() % 10;
            j = (int)rand() % 10;
        }
        int x = (int)rand() % 10;
        int y = (int)rand() % 10;
        while (y == 0 || x >= y)
        {
            x = (int)rand() % 10;
            y = (int)rand() % 10;
        }
        int k = (int)rand() % 100 / 25;
        switch (k)
        {
        case 0:
            cout << "(" << i << "/" << j << ")" << "+" << "(" << x << "/" << y << ")" << "=";
            a[p][0] = i*y + x*j;
            a[p][1] = j*y;
            check1(n, a);
            break;
        case 1:
            cout << "(" << i << "/" << j << ")" << "-" << "(" << x << "/" << y << ")" << "=";
            a[p][0] = i*y - x*j;
            a[p][1] = j*y;
            check1(n, a);
            break;
        case 2:
            cout << "(" << i << "/" << j << ")" << "*" << "(" << x << "/" << y << ")" << "=";
            a[p][0] = i*x;
            a[p][1] = j*y;
            check1(n, a);
            break;
        case 3:
            cout << "(" << i << "/" << j << ")" << "/" << "(" << x << "/" << y << ")" << "=";
            a[p][0] = i*y;
            a[p][1] = j*x;
            check1(n, a);
            break;

        }


    }
    float t = (float)r / (float)n;
    cout << "正确率:" << 100 * t << "%" << endl;
}

 

 

 

 

PSP2.1	Personal Software Process Stages	Time (%) Senior Student	Time (%)
Planning	计划	8	6
· Estimate	估计这个任务需要多少时间	8	6
Development	开发	82	88
· Analysis	需求分析 (包括学习新技术)	6	10
· Design Spec	生成设计文档	5	18
· Design Review	设计复审	4	12
· Coding Standard	代码规范	3	30
· Design	具体设计	10	12
· Coding	具体编码	36	21
· Code Review	代码复审	7	15
· Test	测试（自我测试，修改代码，提交修改）	13	21
Reporting	报告	9	60
·	测试报告	3	20
·	计算工作量	2	10
·	并提出过程改进计划	3	30