• 随机生成30到四则运算题目2


    一.题目:

    接着上次的程序,老师又给二柱子增加了几个条件,对程序再做进一步的改进,要求满足如下条件:

    1.题目避免重复。

    2.可制定。(数量/打印方式)

    3.可以控制下列参数:

    • 是否有乘除法
    • 是否有括号(最多可支持10个数参与计算)
    • 数值范围
    • 加减有无负数
    • 乘除有无余数

    二. 设计思路:

    1.首先利用随机函数生成运算数,然后用选择语句生成运算符,最后将运算数和运算符进行结合。

    2.先将已经生成的运算式进行存储,然后将后来生成的运算式与已存储的式子进行比对,若重复则重新生成。

    3.利用for循环生成用户所需要的式子数,最后根据用户的需求进行选择是否有余数、分数年、括号等要求。

    三. 程序代码:

    //Wangzongze    2016/3/11
    #include<iostream>
    #include<stdlib.h>
    #include<string.h>
    #include<stdio.h>
    #include <ctime>
    #include <cstdlib>
    using namespace std;
    void repeate()
    {
        int d,e,k,m,n, p;
        int o=0,b=0;
        cout<<"请您输入需要产生的题目个数"<<endl;
        cin>>k;
        cout<<endl;
        int character[200][4];
        char operators[4]={'+','-','*','/'};
        char fuhao[16][2]={{'+','+'},{'+','-'},{'+','*'},{'+','/'},{'-','+'},{'-','-'},{'-','*'},{'-','/'},{'*','+'},{'*','-'},{'*','*'},{'*','/'},{'/','+'},{'/','-'},{'/','*'},{'/','/'}};
        int g[100];    
        srand(time(0));                                  //设置随机函数
        int r,t,temp;
        cout<<"输入操作数的范围"<<endl;
        cin>>r>>t;
        cout<<endl;
        if(r>t)
        {
            temp=r;
            r=t;
            t=temp;
        }
        int a;
         cout<<"选择操作(有乘法:1,无乘法:0)"<<endl;
        cin>>a;
        cout<<endl;
        if(a!=0)
        {
           cout<<"选择操作(有余数:1,无余数:0)"<<endl;
            cin>>p;
            cout<<endl;
        }
        cout<<"选择操作(有分数:1,无分数:0)"<<endl;
        int s;
        cin>>s;
        cout<<endl;
        for(int i=0;i<k;i++)
        {
            character[i][0]=rand()%(t-r)+r;                                 //取区间[0,100)的整数
            character[i][1]=rand()%(t-r)+r;
            character[i][2]=rand()%(t-r)+r;
            character[i][3]=rand()%(t-r-1)+r+1;
            d=rand()%100;
            e=rand()%100;
            if(a==1||a==0) 
            {
                switch(a)
                {
                case 0:
                    n=e%2;
                    m=d%2;
                    break;
                case 1:
                    n=e%4;
                    m=d%4;
                    break;
    /******************生成判断运算符的随机数******************/
                }
            }
            else
            {
                cout<<"输入选项有误,请正确输入。"<<endl;
                cout<<"0.无乘除法。"<<endl;
                cout<<"1.有乘除法。"<<endl;
                cout<<"请输入选项(0或1)"<<endl;
                cin>>a;
                i=i-1;
                continue;
            }
            
                   
            if((m==3&&character[i][0]%character[i][1]!=0&&p==0)||(n==3&&character[i][1]%character[i][2]!=0&&p==0))
            {
                i=i-1;
            }
            else
            {
                if((character[i][1]==0&&m==3&&a==0)||(character[i][2]==0&&n==3&&a==0))
                {
                    i=i-1;
                }
                else
                {
                    for(int l=0;l<16;l++)
                    {
                        if(operators[m]==fuhao[l][0]&&operators[n]==fuhao[l][1])
                        {
                            
                            g[o]=l;
                            o++;
                        }
                    }
                    for(int j=i-1;j>=0;j--)
                    {
                        if(character[i][0]==character[j][0]&&character[i][1]==character[j][1]&&character[i][2]==character[j][2]&&g[i]==g[j])
                        {
                            i=i-1;
                            break;
                        }
                    }
                }
            }
            
        }
        if(s==0)
        {
            for(int i=0;i<k;i++)
            {
                if(g[i]==12||g[i]==13||g[i]==14)
                {
                    cout<<character[i][0]<<"÷"<<character[i][1]<<fuhao[g[i]][1]<<character[i][2]<<"="<<endl;
                }
                else if(g[i]==3||g[i]==7||g[i]==11)
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
                else if(g[i]==15)
                {
                    cout<<character[i][0]<<"÷"<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
                else
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<fuhao[g[i]][1]<<character[i][2]<<"="<<endl;
            }
        }
        else
        {
            for(int i=0;i<k;i++)
            {
                int q0,q1,q2;
                q0=rand()%3;
                q1=rand()%3;
                q2=rand()%3;
                
                if(q0==1)
                {
                    cout<<"("<<character[i][0]<<"/"<<character[i][3]<<")"<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
                else if(q0==0)
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
                else if(q1==1)
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<"("<<character[i][1]<<"/"<<character[i][3]<<")"<<"÷"<<character[i][2]<<"="<<endl;
                }
                else if(q1==0)
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
                else if(q2==1)
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<"("<<character[i][2]<<"/"<<character[i][3]<<")"<<"="<<endl;
                }
                else
                {
                    cout<<character[i][0]<<fuhao[g[i]][0]<<character[i][1]<<"÷"<<character[i][2]<<"="<<endl;
                }
            }
        }
    }
    
    int main()
    {
        repeate();
        return 0;
    }

    四.运行结果:

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  • 原文地址:https://www.cnblogs.com/wangzongze/p/5268679.html
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