//李俏，张莹荧，2016.3.15
//随机生成四则运算3

#include<iostream>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
using namespace std;

class Fenshu
{
private:
    int fenzi;  // 分子  
    int fenmu;  // 分母 
public:
    Fenshu(int fz = 0, int fm = 1) :fenzi(fz), fenmu(fm){}
    void set(int,int);
    void simplify();
    friend bool judge1(const Fenshu &c1, const Fenshu &c2);     //判断两个分数是否相等
    friend bool judge2(const Fenshu &c1, int z);     //判断两个分数是否相等
    friend Fenshu add(const Fenshu &c1, const Fenshu &c2);  //两个分数相加，结果要化简  
    friend Fenshu sub(const Fenshu &c1, const Fenshu &c2);  //两个分数相减，结果要化简  
    friend Fenshu mul(const Fenshu &c1, const Fenshu &c2);  //两个分数相乘，结果要化简  
    friend Fenshu div(const Fenshu &c1, const Fenshu &c2);  //两个分数相除，结果要化简 
};

void Fenshu::set(int m, int n)// 分数赋值
{
    fenzi = m;
    fenmu = n;
}

void Fenshu::simplify()// 分数化简
{
    int m, n, r;
    m = abs(fenmu);
    n = abs(fenzi);
    while (r = m%n)  // 求m，n的最大公约数  
    {
        m = n;
        n = r;
    }
    fenmu /= n;     // 化简  
    fenzi /= n;
    if (fenmu<0)  // 将分母转化为正数  
    {
        fenmu = -fenmu;
        fenzi = -fenzi;
    }
}

Fenshu add(const Fenshu &c1, const Fenshu &c2)// 分数相加  
{
    Fenshu t;
    t.fenzi = c1.fenzi*c2.fenmu + c2.fenzi*c1.fenmu;
    t.fenmu = c1.fenmu*c2.fenmu;
    t.simplify();
    return t;
}

Fenshu sub(const Fenshu &c1, const Fenshu &c2)// 分数相减 
{
    Fenshu t;
    t.fenzi = c1.fenzi*c2.fenmu - c2.fenzi*c1.fenmu;
    t.fenmu = c1.fenmu*c2.fenmu;
    t.simplify();
    return t;
}

Fenshu mul(const Fenshu &c1, const Fenshu &c2)// 分数相乘
{
    Fenshu t;
    t.fenzi = c1.fenzi*c2.fenzi;
    t.fenmu = c1.fenmu*c2.fenmu;
    t.simplify();
    return t;
}

Fenshu div(const Fenshu &c1, const Fenshu &c2)// 分数相除 
{
    Fenshu t;
    if (!c2.fenzi) return c1;
    t.fenzi = c1.fenzi*c2.fenmu;
    t.fenmu = c1.fenmu*c2.fenzi;
    t.simplify();
    return t;
}

bool judge1(const Fenshu &c1, const Fenshu &c2)//判断正误
{
    bool flag;
    if ((c1.fenzi == c2.fenzi) && (c1.fenmu == c2.fenmu))
    {
        flag = true;
        return flag;
    }
    else
    {
        flag = false;
        return flag;
    }
}

bool judge2(const Fenshu &c1, int z)//判断正误
{
    bool flag;
    if (0==c1.fenzi-z)
    {
        flag = true;
        return flag;
    }
    else
    {
        flag = false;
        return flag;
    }
}

void main()
{
    int first, second, firstm, secondm;
    int sign, i, j;
    int num, chengchu, fushu, yushu, fanwei;
    int ans,ansm,ansy;
    int right = 0,wrong = 0;
    Fenshu x1, x2, x, y;

    cout << "请输入题目数量：";
    cin >> num;
    if (num == 0)
    {
        exit(1);
    }

    cout << "是否有乘除法？1.是，2.否：";
    cin >> chengchu;

    if (chengchu == 1)
    {
        cout << "除法是否有余数？1.是，2.否：";
        cin >> yushu;
    }

    cout << "减法是否有负数？1.是，2.否：";
    cin >> fushu;

    cout << "请输入数值范围：";
    cin >> fanwei;

    srand((int)time(NULL)); //用时间做种子，每次产生随机数都不一样

    for (i = 0; i<num; i++)
    {
        j = rand() % 2;        //选择生成整数运算还是分数运算

        if (j == 0)           //选择整数
        {
            first = rand() % (fanwei + 1);
            second = rand() % (fanwei + 1);
            if (chengchu == 1)
            {
                sign = rand() % 4;
            }
            else
            {
                sign = rand() % 2;
            }
            switch (sign)
            {
            case 0:                      //整数加法
                cout << first << "+" << second << "=" << endl;
                cout << "请输入结果：";
                cin >> ans;
                if (ans == first + second)
                {
                    cout << "答对了！" << endl;
                    right = right + 1;
                }
                else
                {
                    cout << "答错了！" << endl;
                    wrong = wrong + 1;
                }
                break;
            case 1:                      //整数减法
                if (fushu == 1)
                {
                    cout << first << "-" << second << "=" << endl;
                    cout << "请输入结果：";
                    cin >> ans;
                    if (ans == first - second)
                    {
                        cout << "答对了！" << endl;
                        right = right + 1;
                    }
                    else
                    {
                        cout << "答错了！" << endl;
                        wrong = wrong + 1;
                    }
                }
                else
                {
                    if (first>second)
                    {
                        cout << first << "-" << second << "=" << endl;
                        cout << "请输入结果：";
                        cin >> ans;
                        if (ans == first - second)
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                    else
                    {
                        cout << second << "-" << first << "=" << endl;
                        cout << "请输入结果：";
                        cin >> ans;
                        if (ans == second - first)
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                }
                break;
            case 2:                   //整数乘法
                cout << first << "*" << second << "=" << endl;
                cout << "请输入结果：";
                cin >> ans;
                if (ans == first * second)
                {
                    cout << "答对了！" << endl;
                    right = right + 1;
                }
                else
                {
                    cout << "答错了！" << endl;
                    wrong = wrong + 1;
                }
                break;
            case 3:                   //整数除法
                if (yushu == 1)
                {
                    if (second != 0)
                    {
                        cout << first << "/" << second << "=" << endl;
                        cout << "请输入结果(商和余数)：";
                        cin >> ans>>ansy;
                        if ((ans == (first/second))&&(ansy == (first%second)))
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                    else
                    {
                        i = i - 1;
                    }
                }
                else
                {
                    if (second != 0 && (first%second == 0))
                    {
                        cout << first << "/" << second << "=" << endl;
                        cout << "请输入结果：";
                        cin >> ans;
                        if (ans == first / second)
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                    else
                    {
                        i = i - 1;
                    }
                }
                break;
            }
        }

        else              //选择分数
        {
            first = rand() % (fanwei + 1);
            second = rand() % (fanwei + 1);//分子
            firstm = rand() % (fanwei + 1);
            secondm = rand() % (fanwei + 1);//分母
            if (chengchu == 1)
            {
                sign = rand() % 4;
            }
            else
            {
                sign = rand() % 2;
            }

            switch (sign)
            {
            case 0:                //分数加法
                if ((firstm != 0) && (secondm != 0) && (first<firstm) && (second<secondm))
                {
                    cout << first << "/" << firstm << "  +  " << second << "/" << secondm << "=" << endl;
                    cout << "请输入结果（分子和分母）：";
                    cin >> ans >> ansm;
                    x.set(ans, ansm);
                    x1.set(first, firstm);
                    x2.set(second, secondm);
                    y = add(x1, x2);
                    if (true == judge1(x, y))
                    {
                        cout << "答对了！" << endl;
                        right = right + 1;
                    }
                    else
                    {
                        cout << "答错了！" << endl;
                        wrong = wrong + 1;
                    }
                }
                else
                {
                    i = i - 1;
                }
                break;
            case 1:                //分数减法
                if (fushu == 1)
                {
                    if ((firstm != 0) && (secondm != 0) && (first<firstm) && (second<secondm))
                    {
                        cout << first << "/" << firstm << "  -  " << second << "/" << secondm << "=" << endl;
                        cout << "请输入结果（分子和分母）：";
                        cin >> ans ;
                        if(ans!=0)
                        {
                            cin >> ansm;
                            x.set(ans, ansm);
                            x1.set(first, firstm);
                            x2.set(second, secondm);
                            y = sub(x1, x2);
                            if (true == judge1(x, y))
                            {
                                cout << "答对了！" << endl;
                                right = right + 1;
                            }
                            else
                            {
                                cout << "答错了！" << endl;
                                wrong = wrong + 1;
                            }
                        }
                        else
                        {
                            x1.set(first, firstm);
                            x2.set(second, secondm);
                            y = sub(x1, x2);
                            if (true == judge2(y, ans))
                            {
                                cout << "答对了！" << endl;
                                right = right + 1;
                            }
                            else
                            {
                                cout << "答错了！" << endl;
                                wrong = wrong + 1;
                            }
                        }
                    }
                    else
                    {
                        i = i - 1;
                    }
                }
                else
                {
                    if ((firstm != 0) && (secondm != 0) && (first<firstm) && (second<secondm) && ((first / firstm)>(second / secondm)))
                    {
                        cout << first << "/" << firstm << "  -  " << second << "/" << secondm << "=" << endl;
                        cout << "请输入结果（分子和分母）：";
                        cin >> ans ;
                        if(ans!=0)
                        {
                            cin >> ansm;
                            x.set(ans, ansm);
                            x1.set(first, firstm);
                            x2.set(second, secondm);
                            y = sub(x1, x2);
                            if (true == judge1(x, y))
                            {
                                cout << "答对了！" << endl;
                                right = right + 1;
                            }
                            else
                            {
                                cout << "答错了！" << endl;
                                wrong = wrong + 1;
                            }
                        }
                        else
                        {
                            x1.set(first, firstm);
                            x2.set(second, secondm);
                            y = sub(x1, x2);
                            if (true == judge2(y, ans))
                            {
                                cout << "答对了！" << endl;
                                right = right + 1;
                            }
                            else
                            {
                                cout << "答错了！" << endl;
                                wrong = wrong + 1;
                            }
                        }
                    }
                    else
                    {
                        i = i - 1;
                    }
                }
                break;
            case 2:                //分数乘法
                if ((firstm != 0) && (secondm != 0) && (first<firstm) && (second<secondm))
                {
                    cout << first << "/" << firstm << "  *  " << second << "/" << secondm << "=" << endl;
                    cout << "请输入结果（分子和分母）：";
                    cin >> ans ;
                    if(ans!=0)
                   {
                       cin >> ansm;
                       x.set(ans, ansm);
                       x1.set(first, firstm);
                       x2.set(second, secondm);
                       y = sub(x1, x2);
                       if (true == judge1(x, y))
                       {
                           cout << "答对了！" << endl;
                           right = right + 1;
                       }
                       else
                       {
                           cout << "答错了！" << endl;
                           wrong = wrong + 1;
                       }
                    }
                    else
                    {
                        x1.set(first, firstm);
                        x2.set(second, secondm);
                        y = sub(x1, x2);
                        if (true == judge2(y, ans))
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                }
                else
                {
                    i = i - 1;
                }
                break;
            case 3:                //分数除法
                if ((firstm != 0) && (secondm != 0) && (first != 0) && (second != 0) && (first<firstm) && (second<secondm))
                {
                    cout << first << "/" << firstm << "  /  " << second << "/" << secondm << "=" << endl;
                    cout << "请输入结果（分子和分母）：";
                    cin >> ans ;
                    if(ans!=0)
                    {
                        cin >> ansm;
                        x.set(ans, ansm);
                        x1.set(first, firstm);
                        x2.set(second, secondm);
                        y = sub(x1, x2);
                        if (true == judge1(x, y))
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                    else
                    {
                        x1.set(first, firstm);
                        x2.set(second, secondm);
                        y = sub(x1, x2);
                        if (true == judge2(y, ans))
                        {
                            cout << "答对了！" << endl;
                            right = right + 1;
                        }
                        else
                        {
                            cout << "答错了！" << endl;
                            wrong = wrong + 1;
                        }
                    }
                }
                else
                {
                    i = i - 1;
                }
                break;
            }
        }
    }
    cout << "总共完成" << num << "道题，做对" << right << "道，做错" << wrong << "道题！" << endl;
}