四则运算问题 Java

  1 package helloword1;
  2 
  3 import java.util.Random;
  4 import java.util.Scanner;
  5 public class Test {
  6     public static void main(String[] args) {
  7         zuoYe();
  8     }
  9 
 10     public static void shuZi() {
 11         Random random=new Random();
 12         int a=random.nextInt(100)+1;
 13         System.out.print(a);
 14     }
 15 
 16     public static void fuHao(int p) {
 17         Random random=new Random();
 18         if(p==1){
 19             int a=random.nextInt(4)+1;
 20             if(a==1) System.out.print("+");
 21             if(a==2) System.out.print("-");
 22             if(a==3) System.out.print("*");
 23             if(a==4) System.out.print("/");
 24         }
 25         else {
 26             int a=random.nextInt(2)+1;
 27             if(a==1) System.out.print("+");
 28             if(a==2) System.out.print("-");
 29         }
 30     }
 31 
 32 
 33     public static void zuoYe() {
 34         Scanner sc=new Scanner(System.in);
 35         Random random=new Random();
 36         System.out.println("请输入操作数：");
 37         int b=sc.nextInt();
 38         System.out.println("请输入题目个数:");
 39         int a=sc.nextInt();
 40         System.out.println("请输入每行的题数：");
 41         int h=sc.nextInt();
 42         System.out.println("请输入题目中是否有乘除法：1是  2否");
 43         int p=sc.nextInt();
 44         System.out.println("请输入题目中是否有括号：1是  2否");
 45         int q=sc.nextInt();
 46         sc.close();
 47 
 48         for( int i=1;i<=a;i++){
 49             if(q==1) {
 50                 int c=random.nextInt(5);
 51                 if(c!=0) {
 52                     shuZi();
 53                     for (int j = 0; j < b - 1; j++) {
 54                         if (j < b - 2) {
 55                             int d=random.nextInt(5);
 56                             if (d == 1) {
 57                                 fuHao(p);
 58                                 System.out.print("(");
 59                                 shuZi();
 60                                 fuHao(p);
 61                                 shuZi();
 62                                 System.out.print(")");
 63                                 j++;
 64                             }
 65                             else {
 66                                 fuHao(p);
 67                                 shuZi();
 68                             }
 69                         }
 70                         else {
 71                             fuHao(p);
 72                             shuZi();
 73                         }
 74                     }
 75                 }
 76                 else{
 77                     System.out.print("(");
 78                     shuZi();
 79                     fuHao(p);
 80                     shuZi();
 81                     System.out.print(")");
 82                     for (int j = 1; j < b - 1; j++) {
 83                         if (j < b - 2) {
 84                             int d=random.nextInt(5);
 85                             if (d == 1) {
 86                                 fuHao(p);
 87                                 System.out.print("(");
 88                                 shuZi();
 89                                 fuHao(p);
 90                                 shuZi();
 91                                 System.out.print(")");
 92                                 j++;
 93                             }
 94                             else {
 95                                 fuHao(p);
 96                                 shuZi();
 97                             }
 98                         }
 99                         else {
100                             fuHao(p);
101                             shuZi();
102                         }
103 
104 
105                     }
106                 }
107             }
108 
109             else {
110                 for(int k=1;k<=b;k++)
111                 {
112                     shuZi();
113                     if(k==b) {}
114                     else fuHao(p);
115                 }
116             }
117 
118             System.out.print("=\t\t");
119             if(i%h==0)
120             {
121                 System.out.println();
122             }
123         }
124     }
125 
126 
127 }

标签：Random,Java,int,四则运算,System,问题,nextInt,print,out
来源： https://www.cnblogs.com/yangjialong/p/16686495.html