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  • 四则运算---根据用户要求输出计算题源代码

    import java.util.Scanner;
    public class Test {
     public static void main(String[] args) {
      Scanner scan=new Scanner(System.in);
      System.out.println("请输入题目的数量:");
      int n=scan.nextInt();
      System.out.println("请输入一行的题目数量:");
      int m=scan.nextInt();
      String [] str2=new String [n];
      for(int q=0;q<n;q++) {
       str2[q]=null;
      }
      for(int i=1;i<n+1;i++) {
       int a=(int) (1+Math.random()*(99-1+1));
       int b=(int) (1+Math.random()*(99-1+1));
       int x=(int) (1+Math.random()*(4-1+1));
       boolean t1=true;
       boolean t2=true;
       boolean t3=true;
       boolean t4=true;
       String str1 = null;
       switch(x) {
       case 1:
        str1="+";
        break;
       case 2:
        str1="-";
        if(a<b) {
         t1=false;
         i--;
        }
        break;
       case 3:
        str1="*";
        break;
       case 4:
        str1="/";
        if(a%b!=0) {
         t2=false;
         i--;
        }
        break;
       }
       if(i%m==0) {
        t3=false;
       }
       if(t1&&t2) {
        if(t3) {
         System.out.print("第"+i+"道题 "+a+str1+b+"=      ");
        }
        else {
         System.out.println("第"+i+"道题 "+a+str1+b+"=      ");
        }
       } 
      }
     }
    }
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  • 原文地址:https://www.cnblogs.com/xhj1074376195/p/11551442.html
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