四则运算3

题目要求：

　　1.学生写的程序必须能判定用户的输入答案是否正确

　　2.程序必须能处理四种运算的混合算式

　　3.要求两人合作分析，单独编程，单独撰写博客

团队成员：王硕   http://home.cnblogs.com/u/WS1004/

代码：

//李妍 2015.3.12
//四则运算新 
#include<iostream>
#include<fstream> 
#include<iomanip>
#include<cmath>  
#include<vector>
#include<string>  
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
using namespace std;
#define random() (rand()%1000) 
const int MAX = 1000;

/*输入模块*/
class Input
{
public:
    Input()
    {
        for (int i = 0; i < MAX; i++)
            Str_input[i] = '';
    }
    char Str_input[MAX];
    void inStr()
    {
        cin >> Str_input;
    }
};

/*输出模块*/
class Output
{
public:
    Output()
    {
        result = 0;
    }
    double getRes(double res)
    {
        result = res;
        return result;
    }

private:
    double result;
};

/*计算用的存储结构*/
template <class Type>
class STACK{
private:
    Type base[MAX];
    int Size;
public:
    STACK()
    {
        Size = 0;
    };
    void push(Type a)
    {
        base[Size] = a;
        Size++;
    }
    Type pop()
    {
        return base[--Size];
    }
    int size()
    {
        return Size;
    }
};


/*计算的模块*/
class jisuan
{
public:
    bool shuhanshu(char);
    bool fuhanshu(char);
    int jckh(char);
    bool jcxsd(char *);
    int pdyxj(char);
    double ToData(char*);
    double Call(double, double, char);
    int ppkh(char* buffer, int pos);
    void Opr(STACK<char>&, STACK<double>&, int&);
    double Calculate(char*, double&);

};
bool jisuan::shuhanshu(char ch)
{
    return ((ch >= '0'&&ch <= '9') || ch == '.') ? true : false;
}
bool jisuan::fuhanshu(char ch)
{
    return (ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '#') ? true : false;
}
int jisuan::jckh(char ch)
{
    if (ch == '(')
        return 1;
    if (ch == ')')
        return -1;
    return 0;
}
bool jisuan::jcxsd(char *ch)
{
    int a = 0;
    for (int i = 0; i<strlen(ch); i++)
    if (ch[i] == '.')
        a++;
    if (a>1)
        return false;
    return true;
}
int jisuan::pdyxj(char ch)          //符号的优先极别
{
    switch (ch)
    {
    case '+':
        return 0;
    case '-':
        return 0;
    case '*':
        return 1;
    case '/':
        return 1;
    case '#':
        return 0;
    default:
        return -1;
    }
}
double jisuan::ToData(char* ch)   //将数字转化为数值
{
    int i, j, sumn = 0;
    double sum = 0.0;
    if (!jcxsd(ch)) return 0.0;
    for (i = 0; i<strlen(ch); i++)
    {
        if (ch[i] != '.')
            sumn = sumn * 10 + (ch[i] - '0');
        else break;
    }
    if (i<strlen(ch))
    for (j = i + 1; j<strlen(ch); j++)
        sum = sum * 10 + (ch[j] - '0');
    sum /= pow(10.0, (double)(strlen(ch) - 1 - i));
    return (sum + sumn);
}
double jisuan::Call(double sum, double data, char ch)
{
    double ans = 0.0;
    switch (ch)
    {
    case '+':
        ans = sum + data;
        break;
    case '-':
        ans = sum - data;
        break;
    case '*':
        ans = sum*data;
        break;
    case '/':
        if (data != 0.0)
            ans = sum / data;
        else
        {
            cout << "程序出现除0错误，终止！
";
            system("pause");
            exit(1);
        }
        break;
    case '#':
        return 0;
    default:ans = 0.0;
        break;
    }
    return ans;
}
int jisuan::ppkh(char* buffer, int pos)     //利用栈找到匹配的括号
{
    STACK<char> Temp;
    int i;
    for (i = pos; i<strlen(buffer); i++)
    {
        if (jckh(buffer[i]) == 1)
            Temp.push('0');
        if (jckh(buffer[i]) == -1)
        {
            Temp.pop();
            if (Temp.size() == 0) return i;
        }
    }
    return -1;
}
void jisuan::Opr(STACK<char>& symbol, STACK<double>& data, int& mark)
{
    double sum;
    while (symbol.size() != 0)
    {
        char tem = symbol.pop();
        int temp = pdyxj(tem);
        symbol.push(tem);
        if (temp<mark)
            break;
        else{
            sum = Call(data.pop(), data.pop(), symbol.pop());
            data.push(sum);
        }
    }
}
double jisuan::Calculate(char* buffer, double& sum)   //字符串读入和各个函数调配
{
    STACK<double> data;
    STACK<char> symbol;
    double ans;
    char temp[MAX];
    int ct = 0, mark = 0, tp = 0;
    data.push(sum);
    while (ct <= strlen(buffer))
    {
        if (shuhanshu(buffer[ct]))            //如果是数字或小数点
        {
            while (ct < strlen(buffer) && shuhanshu(buffer[ct]))
                temp[tp++] = buffer[ct++];
            temp[tp] = '';
            tp = 0;                         //读到非数字也非小数为止
            ans = ToData(temp);             //把读到的字符串转化为数
            data.push(ans);

            if (ct == strlen(buffer))        //已经独到字符串末尾
            {
                mark = 0;
                Opr(symbol, data, mark);
                sum = data.pop();
                return sum;
            }
            else{
                int mark = pdyxj(buffer[ct]);
                Opr(symbol, data, mark);     //计算
            }
        }
        else if (fuhanshu(buffer[ct]))         //如果是运算符
            symbol.push(buffer[ct++]);     //运算符入symbol栈
        else
        {
            char BF[100]; int k = 0;          //如果都不是，则只能是括号
            while (jckh(buffer[ct]) != 1 && ct <= strlen(buffer))
                BF[k++] = buffer[ct++];
            BF[k] = '';
            if (jckh(buffer[ct]) == 1)       //一旦读到左括号，寻找它匹配的右括号
            {
                int i, j;
                char Temp[100];
                for (i = ct + 1, j = 0; i<ppkh(buffer, ct); i++, j++)
                    Temp[j] = buffer[i];     //把这对括号中的字符串存入Temp
                Temp[j] = '';
                data.push(Calculate(Temp, sum));

                ct += (strlen(Temp) + 1);
                if (ct + 1 == strlen(buffer))
                {
                    mark = 0;
                    Opr(symbol, data, mark);
                    sum = data.pop();
                    return sum;
                }
                else
                {
                    mark = pdyxj(buffer[ct + 1]); //不是的话继续计算
                    Opr(symbol, data, mark);
                }
                ct++;                           //读入下一个字符
            }
        }
    }
    return 0.;
}

string  i_s(int shuzi)
{
    int temp = abs(shuzi);
    char str[100];
    itoa(temp, str, 10);
    string str1 = str;
    return str1;
}

string zuhe(string str1, string str2, char x)
{
    string expression;
    expression = str1 + x + str2;
    return expression;
}

//是否有乘除法
char operator_random(int c1)
{
    char o;
    int c, c2;
    if (c1 == 0)
    {
        c2 = 2;
    }
    if (c1 == 1)
    {
        c2 = 4;
    }
    c = (rand() % 100) % c2;
    if (c == 0) o = '+';
    else if (c == 1) o = '-';
    else if (c == 2) o = '*';
    else o = '/';
    return o;
}

void main()
{
    srand((unsigned)time(NULL));//设置时间种子 ，以使程序每次得到的结果都不同 
    int mul_div, number, output_mode, value_range, num_1, num_2, plus_or_minus, jump, yushu, kuohao, score = 0;
    double answer = 0.0, solution;
    string str_1, str_2, temp;
    char operator_r;
    char storage[100];
    cout << "    是否有乘除法？<0>没有   <1>有：";
    cin >> mul_div;
    cout << "    有无括号？    <0>没有   <1>有：";
    cin >> kuohao;
    cout << "    加减有无负数？<0>没有   <1>有：";
    cin >> plus_or_minus;
    cout << "    除法有无余数？<0>没有   <1>有：";
    cin >> yushu;
    cout << "    题目如何输出？<0>在文件中输出 ，<1>在此直接输出：";
    cin >> output_mode;
    cout << "    请输入数值范围：";
    cin >> value_range;

    cout << "    请输入题目的数量：";
    cin >> number;
    cout << endl;

    string *expression = new string[number];//string expression[number];
    ofstream fout;
    if (output_mode == 0)
    {
        fout.open("yunsuan.txt");
        fout << number << "道随机四则运算：" << endl;
    }
    else
    {
        cout << number << "道随机四则运算：" << endl;
    }

    for (int i = 0; i < number; i++)
    {
        num_1 = random() % value_range + 1;
        num_2 = random() % value_range + 1;
        int length;//运算式的长度   
        int j = num_1 - num_2;
        int x = num_1%num_2;
        operator_r = operator_random(mul_div);
        length = random() % 9 + 2;
        str_1 = i_s(num_1);
        str_2 = i_s(num_2);
        expression[i] = zuhe(str_1, str_2, operator_r);
        if (length>2)
        {
            for (length; length>2; length--)
            {
                operator_r = operator_random(mul_div);
                str_1 = expression[i];
                if (kuohao == 1)
                {
                    jump = random() % 2;
                    if (jump == 0)
                    {
                        str_1 = '(' + str_1 + ')';
                    }
                }
                operator_r = operator_random(mul_div);
                num_2 = random() % value_range + 1;
                str_2 = i_s(num_2);
                jump = random() % 2;
                if (jump == 0)
                {
                    temp = str_1;
                    str_1 = str_2;
                    str_2 = temp;
                }
                expression[i] = zuhe(str_1, str_2, operator_r);

            }
        }
        if (output_mode == 1)
        {

            strcpy(storage, expression[i].c_str());

            cout.precision(12);            //设置精度为12

            Input in;
            jisuan cl;
            Output out;

            answer = out.getRes(cl.Calculate(storage, answer)); //计算模块

            if (plus_or_minus == 0)
            {
                if (answer>0)
                {
                    cout << "    (" << i + 1 << ")" << expression[i] << "=" << endl;
                    cout << "    输入结果：";
                    cin >> solution;
                    cout << "    正确结果：" << answer << endl;
                    if (answer == solution)
                    {
                        score++;
                        cout << "    正确！！！" << endl;
                        cout << endl;
                    }
                    else
                    {
                        cout << "    很遗憾，错误！" << endl;
                        cout << endl;
                    }
                }    //如果结果小于0
                else
                {
                    i = i - 1;
                }
            }
            else  //如果不要求加减无负数
            {
                cout << "    (" << i + 1 << ")" << expression[i] << "=" << endl;
                cout << "    输入结果：";
                cin >> solution;
                cout << "    正确结果：" << answer << endl;
                if (answer == solution)
                {
                    score++;
                    cout << "    正确！！！" << endl;
                    cout << endl;
                }
                else
                {
                    cout << "    很遗憾，错误！" << endl;
                    cout << endl;
                }
            }
        }
        else
        {
            fout << expression[i] << "=" << endl;
        }
    }
    if (output_mode == 1)
    {
        cout << "    得分：" << score << endl;
        cout << endl;
    }

    if (output_mode == 1)
    {
        fout.close();
    }
}

调试结果：

输出到文件：

结对开发照片：