四则运算3

设计思路：

使用函数将四则运算封装成四类，分别是jiajian00（），jiajian01（），chengchu00（），chengchu01（）.

在主函数中调用函数fushuyushu0（）来实现加减法有无负数和除法有无余数的控制；

在jiajian00（），jiajian01（），chengchu00（），chengchu01（）函数中分别实现生成运算数，输出题目，计算结果并判断客户输入答案的正误。

本程序实现了整数的加减乘除运算功能，并可控制有无负数，有无余数，运算数的取值范围，以及判断正误和统计正确题目数量的功能。

 实验代码：

#include<iostream>
#include<ctime> 
#include<vector> 
using namespace std;
int zq=0;
void chengchu00(int min, int max)//整数无余数
{
    int c1, c2, k,z,x;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------乘法部分
    {
        cout << c1 << "*" << c2 << "=" << endl;
        x = c1*c2;
        cout << "请输入你的答案：" << endl;
        cin >> z;
        if (z == x)
        {
            cout << "正确" << endl;
            ++zq;
        }
        else
            cout << "错误，正确答案是：" << x << endl;
    }
    else//------------------------------除法部分
    {
        for (;;)
        {
            c1 = rand() % (max - min) + min + 1;
            c2 = rand() % (max - min) + min + 1;
            int c3 = c1*c2;
            do
            {
                c3 = c3 - c1;

            } while (c3 > max);
            if ((c3 < max) && (c1 != 0))
            {
                cout << c3 << "/" << c1 << "=" << endl; 
                x = c3/c1;
                cout << "请输入你的答案：" << endl;
                cin >> z;
                if (z == x)
                {
                    cout << "正确" << endl;
                    ++zq;
                }
                else
                    cout << "错误，正确答案是：" << x << endl; break;
            }
        }
    }
}
void chengchu01(int min, int max)//整数有余数
{
    int c1, c2, k;
    float x,z;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------乘法部分
    {
        cout << c1 << "*" << c2 << "=" << endl;
        x = c1*c2;
        cout << "请输入你的答案：" << endl;
        cin >> z;
        if (z == x)
        {
            cout << "正确" << endl;
            ++zq;
        }
        else
            cout << "错误，正确答案是：" << x << endl;
    }
    else//------------------------------除法部分
    {
        for (;;)
        {
            c1 = rand() % (max - min) + min + 1;
            if (c1 == 0)
            {
                c2 = rand() % (max - min) + min + 1;
                if (c2 != 0)
                {
                    cout << c1 << "/" << c2 << "=" << endl;
                    x =(float) c1 / c2;
                    cout << "请输入你的答案：" << endl;
                    cin >> z;
                    if (z == x)
                    {
                        cout << "正确" << endl;
                        ++zq;
                    }
                    else
                        cout << "错误，正确答案是：" << "(" <<c1<<"/"<<c2<<")"<<endl; break;
                }
            }
            else
            {
                c2 = rand() % c1;
                if (c2 != 0)
                {
                    cout << c1 << "/" << c2 << "=" << endl; 
                    x = c1 / c2;
                    int y = c1%c2;
                    cout << "请输入你的答案：" << endl;
                    int m;
                    cin >> z>>m;
                    if ((z == x)&&(y==m))
                    {
                        cout << "正确" << endl;
                        ++zq;
                    }
                    else
                        cout << "错误，正确答案是：" << "(" << c1 << "/" << c2 << ")" << endl; break;
                }
            }
        }
    }
}
void jiajian00(int min, int max)//整数无负数
{
    int c1, c2, k,x,z;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------加法部分
    {
        cout << c1 << "+" << c2 << "=" << endl;
        x = c1 + c2;
        cout << "请输入你的答案：" << endl;
        cin >> z;
        if (z == x)
        {
            cout << "正确" << endl;
            ++zq;
        }
        else
            cout << "错误，正确答案是：" << x << endl;

    }
    else//------------------------------减法部分
    {
        if (c1>c2)
        {
            cout << c1 << "-" << c2 << "=" << endl;
            x = c1 - c2;
            cout << "请输入你的答案：" << endl;
            cin >> z;
            if (z == x)
            {
                cout << "正确" << endl;
                ++zq;
            }
            else
                cout << "错误，正确答案是：" << x << endl;
        }
        else
        {
            cout << c2 << "-" << c1 << "=" << endl;
            x = c2 - c1;
            cout << "请输入你的答案：" << endl;
            cin >> z;
            if (z == x)
            {
                cout << "正确" << endl;
                ++zq;
            }
            else
                cout << "错误，正确答案是：" << x << endl;
        }
            
    }
}
void jiajian01(int min, int max)//整数有负数
{
    int c1, c2, k,x,z;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------加法部分
    {
        cout << c1 << "+" << c2 << "=" << endl;
        x = c1+ c2;
        cout << "请输入你的答案：" << endl;
        cin >> z;
        if (z == x)
        {
            cout << "正确" << endl;
            ++zq;
        }
        else
            cout << "错误，正确答案是：" << x << endl;
    }
    else//------------------------------减法部分
    {
        cout << c1 << "-" << c2 << "=" << endl;
        x = c1 - c2;
        cout << "请输入你的答案：" << endl;
        cin >> z;
        if (z == x)
        {
            cout << "正确" << endl;
            ++zq;
        }
            
        else
            cout << "错误，正确答案是：" << x << endl;
    }
}
void fushuyushu0(int a,int b, int min, int max)//整数运算
{

    if ((a == 1) && (b == 1))
    {
        int k = rand() % 2;
        if (k == 0)
        {
            chengchu01(min, max);
        }
        else
            jiajian01(min, max);
    }
    if ((a == 0) && (b == 0))
    {
        int k = rand() % 2;
        if (k == 0)
        {
            chengchu00(min, max);
        }
        else
            jiajian00(min, max);
    }
    if ((a == 0) && (b == 1))
    {
        int k = rand() % 2;
        if (k == 0)
        {
            chengchu01(min, max);
        }
        else
            jiajian00(min, max);
    }
    if ((a == 1) && (b == 0))
    {
        int k = rand() % 2;
        if (k == 0)
        {
            chengchu00(min, max);
        }
        else
            jiajian01(min, max);
    }

}

void chengchu10(int min, int max)//真分数无余数
{
    int c1, c2, c3, c4, k;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    c3 = rand() % (max - min) + min + 1;
    c4 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------乘法部分
        cout << "cuowu";
    else//------------------------------除法部分
    {
        cout << "cuowu";
        
    }
}
void jiajian10(int min, int max)//真分数无负数
{
    int c1, c2, k;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------加法部分
    {
        cout << c1 << "+" << c2 << "=" << endl;
    }
    else//------------------------------减法部分
    {
        if (c1>c2)
        {
            cout << c1 << "-" << c2 << "=" << endl;
        }
        else
            cout << c2 << "-" << c1 << "=" << endl;


    }
}
void jiajian11(int min, int max)//真分数有负数
{
    int c1, c2, k;
    c1 = rand() % (max - min) + min + 1;
    c2 = rand() % (max - min) + min + 1;
    k = rand() % 2;
    if (k == 0)//---------------------------------加法部分
    {
        cout << c1 << "+" << c2 << "=" << endl;
    }
    else//------------------------------减法部分
    {
        cout << c1 << "-" << c2 << "=" << endl;
    }
}
void fushuyushu1(int a, int b, int min, int max)//真分数运算
{

    if (a == 1)
    {
        int k = rand() % 2;
        if (k == 0)
            chengchu10(min, max);
        else
            jiajian11(min, max);
    }
    if (a == 0)
    {
        int k = rand() % 2;
        if (k == 0)
            chengchu10(min, max);
        else
            jiajian10(min, max);
    }
}
int main()
{
    int a, b, c, min, max,N;
    cout << "请输入出题数目：" << endl;
    cin >> N;
    cout << "减法是否有负数：（0否；1是）" << endl;
    cin >> a;
    cout << "除法是否有余数：（0否；1是）" << endl;
    cin >> b;
    cout << "请分别输入下限和上限" << endl;
    cin >> min >> max;
    for (int i = 0; i < N; i++)
    {
        fushuyushu0(a, b, min, max);
    }
    cout << "共答对" << zq << "道题" << endl;
    /*cout << "整数运算输入0，真分数运算输入1" << endl;
    cin >> c;
    if (c == 0)
    {
        cout << "减法是否有负数：（0否；1是）" << endl;
        cin >> a;
        cout << "除法是否有余数：（0否；1是）" << endl;
        cin >> b;
        cout << "请分别输入下限和上限" << endl;
        cin >> min >> max;
        for (int i = 0; i < 100; i++)
        {
            fushuyushu0(a, b, min, max);
        }
    }
        
      else
    {
        for (int i = 0; i < 100; i++)
        {
            cout << "减法是否有负数：（0否；1是）" << endl;
            cin >> a;
            fushuyushu1(a,b,min, max);
        }

    }*/
    return 0;
}

 实验截图：

分为三种情况，程序正常。

减法无负数，除法有余数：

减法无负数，除法无余数：

减法有负数，除法无余数：

实验总结：

通过本次实验的结对开发，在实践中检验了”做中学“，结对开发，表达自己，互相交流。结对开发给我很大的思考空间，给予很大的鼓励，发挥了古语中所谓“三个臭皮匠”作用，相互讨论，相互批评改正，相互交换思路，写出较为合理的程序。我觉得很有意义。

组员：

张家军

徐少凯      博客地址： http://www.cnblogs.com/3712k/