二柱子代码版

今天对二柱子进行了升级，可以设置参数，选择难度

package random;


import java.util.*;
import javax.script.*;

public class Quesfa {

    static char[] fu = {'+','-','*','/'};//符号
    static String[] ti = new String[100];//题
    static String[] daan = new String[100];
    static String[] cuoti = new String[100];//错题
    static String[] cuotidaan = new String[100];//错题答案
    static int tishu = 30;//题数
    static int caozuoshu = 2;//操作数
    static int fanwei = 100;//范围
    static int cuotishu = 0;//错题数

    public static void choose()
    {
        Scanner s = new Scanner(System.in);
        
        System.out.println("1. 参数设置");
        System.out.println("2. 小学二年级口算题");
        System.out.println("3. 小学三年级口算题");
        System.out.println("4. 小学四年级口算题");
        System.out.println("5. 错题集");
        
        int x = s.nextInt();
        while(x!=0) {
        
        switch (x) {
        
        case 1:
            canshu();
            break;
        case 2:
            chuti(tishu, 2, fanwei);
            suandaan();
            zuoti();
            break;
        case 3:
            chuti(tishu, 4, fanwei);
            suandaan();
            zuoti();
            break;
        case 4:
            chuti(tishu, 5, fanwei);
            suandaan();
            zuoti();
            break;
        case 5:
            cuotiji();
            break;
            
        default:System.out.println("请输入1-5");
            break;
        }
        System.out.println("1. 参数设置");
        System.out.println("2. 小学二年级口算题");
        System.out.println("3. 小学三年级口算题");
        System.out.println("4. 小学四年级口算题");
        System.out.println("5. 错题集");
        x = s.nextInt();
        }
        
    }
    
    //参数
    public static void canshu()
    {
        Scanner c = new Scanner(System.in);
        System.out.print("题数：");
        tishu=c.nextInt();
        
        //System.out.print("操作数：");
        //caozuoshu=c.nextInt();
        
        System.out.print("范围：");
        fanwei=c.nextInt();
        System.out.println("参数设置完成");
    }
    
    //出题
    public static void chuti(int tishu,int caozuoshu,int fanwei)
    {
        int a=0;
        int c=0;
        int d=0;
        int e=0;
        Random r=new Random();
        for(int i=0;i<tishu;i++)
        {
            StringBuilder b = new StringBuilder();
            if(caozuoshu==2)
            {
                d=r.nextInt(4);
                if(d==3)
                {
                    while(true)
                    {
                        e=r.nextInt(fanwei+1);
                        c=r.nextInt(fanwei+1);
                        a=c*e;
                        if(a<=fanwei&&c!=0)
                            break;
                    }
                }
                else {
                    a=r.nextInt(fanwei+1);
                    d=r.nextInt(3);
                    c=r.nextInt(fanwei+1);
                }
                b.append(a);
                b.append(fu[d]);
                b.append(c);
            }
            else {
                for(int j=1;j<=2*caozuoshu-1;j+=2)
                {
                    a=r.nextInt(fanwei+1);
                    b.append(a);
                    if(j!=2*caozuoshu-1) {
                        b.append(fu[r.nextInt(3)]);
                    }
                }
            }
            
            ti[i]= b.toString();
        }
        
    }
    
    //查重
    public static boolean same()
    {
        for(int i=0;i<tishu;i++) {
            for(int j=i+1;j<tishu;j++) {
                if(ti[i].equals(ti[j]))
                {
                    //System.out.println("有重复");
                    return true;
                }
            }
        }
        //System.out.println("无重复");
        return false;
    }
    
    //算答案
    public static void suandaan()
    {
        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
        ScriptEngine scriptEngine = scriptEngineManager.getEngineByName("nashorn");
        
        for(int i=0;i<tishu;i++) {
            try {
                String result = String.valueOf(scriptEngine.eval(ti[i]));
                //System.out.println(result);
                daan[i]=result;
            } catch (ScriptException e) {
                e.printStackTrace();
            }
        }
        
    }
    
    
    //做题
    public static void zuoti() {
        Scanner indaan = new Scanner(System.in);
        String an="";
        
        for(int i=0;i<tishu;i++)//去重打印
        {
            if(!same()) {
                System.out.print(i+1+".\t"+ti[i]+"=");
                an=indaan.next();
                if (an.equals(daan[i])) {
                    System.out.println("√");
                }
                else {
                    System.out.println("×");
                    cuoti[cuotishu]=ti[i];
                    cuotidaan[cuotishu]=daan[i];
                    cuotishu++;
                }
            }
            else {
                i--;
            }
        }
        System.out.println("错题数："+cuotishu+"   正确率:"+(double)(tishu-cuotishu)*100/tishu+"%");
    }
    
    //错题集
    public static void cuotiji()
    {
        Scanner indaan = new Scanner(System.in);
        String an="";
        System.out.println("错题集:");
        int temp=0;
        for(int i=0;i<cuotishu;i++)
        {
                System.out.println(i+1+".\t"+cuoti[i]+"=");
                an=indaan.next();
                
                if (an.equals(cuotidaan[i])) {
                    System.out.println("√");
                }
                else {
                    System.out.println("×");
                    cuoti[temp]=cuoti[i];
                    cuotidaan[temp]=cuotidaan[i];
                    temp++;
                }
        }
        cuotishu = temp;
        if(cuotishu==0)
            System.out.println("没错题了");
            
        }
    
    public static void main(String[] args) {
        choose();
     }

}

接下来要去学习web版了

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