第三章(循环) 编程题 3

 1 
 2 import java.util.Scanner;
 3 
 4 public class Main {
 5 
 6     public static void main(String[] args) {
 7         // TODO Auto-generated method stub
 8         
 9         Scanner in = new Scanner(System.in);
10         
11 
12         int n = in.nextInt();
13         int m = in.nextInt();
14         in.close();
15         
16         int i,j=2 ;
17 
18         int count = 0;
19         int sum = 0;
20         
21         while(count<m)
22         {
23             int isPrime = 1;
24             for (i=2;i<j;i++)
25             {
26                 if ( j%i == 0)
27                 {
28                     isPrime = 0;
29                     break;
30                 }
31             }
32             if ( isPrime ==0)
33             {
34 //                System.out.println( j + "不是素数");
35             }
36             else
37             {
38                 System.out.println( j + "是素数");
39                 sum = sum + j;
40                 count = count + 1;
41             }
42             j++;
43         }
44         
45         
46         j = 2;
47         i = 2;
48         count = 0;
49         int sum2 = 0;
50         while(count<(n-1))
51         {
52             int isPrime = 1;
53             for (i=2;i<j;i++)
54             {
55                 if ( j%i == 0)
56                 {
57                     isPrime = 0;
58                     break;
59                 }
60             }
61             if ( isPrime ==0)
62             {
63 //                System.out.println( j + "不是素数");
64             }
65             else
66             {
67                 System.out.println( j + "是素数");
68                 sum2 = sum2 + j;
69                 count = count + 1;
70             }
71             j++;
72         }
73         System.out.println(sum-sum2+ ",sum= " + sum + " , sum2= " + sum2);    
74         
75         
76     }
77 
78 }
79