軟體工程個人作業01

標籤：

1.程式設計思想

　　引用Random類，先設定3個隨機數，其中1個為運算子隨機數，另外兩個為0到99的整數隨機數，進行整數的四則運算。再設定3個隨機數，其中一個為運算子隨機數，另外兩個為0到99的整數隨機數，前兩個隨機整數和後兩個隨機整數各組成一個真分數，進行真分數的四則運算。一個最大外迴圈，迴圈次數為30次，得出30道題。

2.來源程式代碼

  1 package ketang;  2   3 import java.util.Random;  4   5 public class SiZeYunSuan {  6   7     public static void main(String[] args) {  8         int a1,a2,a;  9         Random ran=new Random(); 10         for(int i=0;i<30;i++) 11         { 12             a=ran.nextInt(5); 13             a1=ran.nextInt(100); 14             a2=ran.nextInt(100); 15             if(a==0) 16                 System.out.println(a1+" + "+a2+" ="); 17             if(a==1) 18             { 19                 System.out.println(a1+" - "+a2+" ="); 20             } 21             if(a==2) 22                 System.out.println(a1+" * "+a2+" ="); 23             if(a==3) 24             { 25                 while(a2==0) 26                     a2=ran.nextInt(100); 27                 System.out.println(a1+" / "+a2+" ="); 28             } 29             if(a==4) 30             { 31                 int aa,a3,a4; 32                 aa=ran.nextInt(4); 33                 a3=ran.nextInt(100); 34                 a4=ran.nextInt(100); 35                 if(aa==0) 36                 { 37                     if(a1<a2&&a3<a4) 38                         System.out.println(a1+"/"+a2+" + "+a3+"/"+a4+" ="); 39                     if(a1>a2&&a3>a4) 40                         System.out.println(a2+"/"+a1+" + "+a4+"/"+a3+" ="); 41                     if(a1>a2&&a3<a4) 42                         System.out.println(a2+"/"+a1+" + "+a3+"/"+a4+" ="); 43                     if(a1<a2&&a3>a4) 44                         System.out.println(a1+"/"+a2+" + "+a4+"/"+a3+" ="); 45                     if(a1<a2&&a3==a4) 46                         System.out.println(a1+"/"+a2+" + "+a3+"/"+(a4+1)+" ="); 47                     if(a1>a2&&a3==a4) 48                         System.out.println(a2+"/"+a1+" + "+a3+"/"+(a4+1)+" ="); 49                     if(a1==a2&&a3<a4) 50                         System.out.println(a1+"/"+(a2+1)+" + "+a3+"/"+a4+" ="); 51                     if(a1==a2&&a3>a4) 52                         System.out.println(a1+"/"+(a2+1)+" + "+a4+"/"+a3+" ="); 53                     if(a1==a2&&a3==a4) 54                         System.out.println(a1+"/"+(a2+1)+" + "+a4+"/"+(a3+1)+" ="); 55                 } 56                 if(aa==1) 57                 { 58                     if(a1<a2&&a3<a4) 59                         System.out.println(a1+"/"+a2+" - "+a3+"/"+a4+" ="); 60                     if(a1>a2&&a3>a4) 61                         System.out.println(a2+"/"+a1+" - "+a4+"/"+a3+" ="); 62                     if(a1>a2&&a3<a4) 63                         System.out.println(a2+"/"+a1+" - "+a3+"/"+a4+" ="); 64                     if(a1<a2&&a3>a4) 65                         System.out.println(a1+"/"+a2+" - "+a4+"/"+a3+" ="); 66                     if(a1<a2&&a3==a4) 67                         System.out.println(a1+"/"+a2+" - "+a3+"/"+(a4+1)+" ="); 68                     if(a1>a2&&a3==a4) 69                         System.out.println(a2+"/"+a1+" - "+a3+"/"+(a4+1)+" ="); 70                     if(a1==a2&&a3<a4) 71                         System.out.println(a1+"/"+(a2+1)+" - "+a3+"/"+a4+" ="); 72                     if(a1==a2&&a3>a4) 73                         System.out.println(a1+"/"+(a2+1)+" - "+a4+"/"+a3+" ="); 74                     if(a1==a2&&a3==a4) 75                         System.out.println(a1+"/"+(a2+1)+" - "+a4+"/"+(a3+1)+" ="); 76                 } 77                 if(aa==2) 78                 { 79                     if(a1<a2&&a3<a4) 80                         System.out.println(a1+"/"+a2+" * "+a3+"/"+a4+" ="); 81                     if(a1>a2&&a3>a4) 82                         System.out.println(a2+"/"+a1+" * "+a4+"/"+a3+" ="); 83                     if(a1>a2&&a3<a4) 84                         System.out.println(a2+"/"+a1+" * "+a3+"/"+a4+" ="); 85                     if(a1<a2&&a3>a4) 86                         System.out.println(a1+"/"+a2+" * "+a4+"/"+a3+" ="); 87                     if(a1<a2&&a3==a4) 88                         System.out.println(a1+"/"+a2+" * "+a3+"/"+(a4+1)+" ="); 89                     if(a1>a2&&a3==a4) 90                         System.out.println(a2+"/"+a1+" * "+a3+"/"+(a4+1)+" ="); 91                     if(a1==a2&&a3<a4) 92                         System.out.println(a1+"/"+(a2+1)+" * "+a3+"/"+a4+" ="); 93                     if(a1==a2&&a3>a4) 94                         System.out.println(a1+"/"+(a2+1)+" * "+a4+"/"+a3+" ="); 95                     if(a1==a2&&a3==a4) 96                         System.out.println(a1+"/"+(a2+1)+" * "+a4+"/"+(a3+1)+" ="); 97                 } 98                 if(aa==3) 99                 {100                     if(a1<a2&&a3<a4)101                         System.out.println(a1+"/"+a2+" / "+a3+"/"+a4+" =");102                     if(a1>a2&&a3>a4)103                         System.out.println(a2+"/"+a1+" / "+a4+"/"+a3+" =");104                     if(a1>a2&&a3<a4)105                         System.out.println(a2+"/"+a1+" / "+a3+"/"+a4+" =");106                     if(a1<a2&&a3>a4)107                         System.out.println(a1+"/"+a2+" / "+a4+"/"+a3+" =");108                     if(a1<a2&&a3==a4)109                         System.out.println(a1+"/"+a2+" / "+a3+"/"+(a4+1)+" =");110                     if(a1>a2&&a3==a4)111                         System.out.println(a2+"/"+a1+" / "+a3+"/"+(a4+1)+" =");112                     if(a1==a2&&a3<a4)113                         System.out.println(a1+"/"+(a2+1)+" / "+a3+"/"+a4+" =");114                     if(a1==a2&&a3>a4)115                         System.out.println(a1+"/"+(a2+1)+" / "+a4+"/"+a3+" =");116                     if(a1==a2&&a3==a4)117                         System.out.println(a1+"/"+(a2+1)+" / "+a4+"/"+(a3+1)+" =");118                 }119                 120             }121         }122     }123 124 }

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3.運行結果

   　　

4.分析課上未完成原因

　　課上想的少，想的不周全。

軟體工程個人作業01