• 随堂小测加减乘除


    首先思路:先试用了rand产生随机数种子来产生随机数,然后定义了十个数组分别来进行查重和存储数据

    package Ktang;
    import java.util.Random;
    import java.util.Scanner;
    public class Student {
    static final int x = 100000;
    public static void main(String[] args) {
    // TODO Auto-generated method stub
    Random r = new Random(1);
    int i=0;
    int j=0;
    Scanner sc=new Scanner(System.in);
    int a;
    int b;
    int c=0;
    int date1[]=new int[x];
    int date2[]=new int[x];
    int jia1[]=new int[x];
    int jia2[]=new int[x];
    int jian1[]=new int[x];
    int jian2[]=new int[x];
    int cheng1[]=new int[x];
    int cheng2[]=new int[x];
    int chu1[]=new int[x];
    int chu2[]=new int[x];
    System.out.println("请输入你想要多少的题数和一行个数");
    a=sc.nextInt();
    b=sc.nextInt();
    for(i=0;i<a;i++)
    {
    int ran1 = r.nextInt(100);
    int ran2 = r.nextInt(100);
    date1[i]=ran1;
    date2[i]=ran2;
    jia1[i]= ran1;
    jia2[i]=ran2;
    jian1[i]=ran1;
    jian2[i]=ran2;
    cheng1[i]=ran1;
    cheng2[i]=ran2;
    chu1[i]=ran1;
    chu2[i]=ran2;
    }
    while(c<=a)
    {
    c++;
    for(i=1;i<=b;i++)
    {
    int ran2 = r.nextInt(3);

    System.out.println("第"+i+"个");
    switch(ran2)
    {
    case 0 :for(j=a;j>=0;j--)
    {if(jia1[j]!=date1[i]&&jia2[j]!=date2[i])
    {System.out.println(date1[i]+"+"+date2[i]+"=");}}
    break;

    case 1 :for(j=a;j>=0;j--)
    {if(jian1[j]!=date1[i]&&jian2[j]!=date2[i])
    {if(date1[i]>=date2[i])
    {
    System.out.println(date1[i]+"-"+date2[i]+"=");
    break;}
    else
    {System.out.println(date1[i]+"-"+date2[i]+"=");
    break;
    }}}
    case 2 :for(j=a;j>=0;j--)
    {if(cheng1[j]!=date1[i]&&cheng2[j]!=date2[i])
    System.out.println(date1[i]+"*"+date2[i]+"=");
    break;}
    case 3 :
    for(j=a;j>=0;j--)
    {if(chu1[j]!=date1[i]&&chu2[j]!=date2[i])
          System.out.println(date1[i]+"/"+date2[i]+"=");
    break;
    }
    }
    }
    }
    }
    }

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  • 原文地址:https://www.cnblogs.com/sunhongbin/p/11539863.html
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