第一次实训作业

 1 package bbb;
 2 
 3 public class Chicken {
 4 
 5     public static void main(String[] args) {
 6          int x,y,z;
 7          for(x=0;x<=14;x++)
 8              for(y=0;y<=25;y++)
 9              {
10                  z=100-x-y;
11                  if(x+y+z==100&&5*x+3*y+z/3.0==100)
12                      System.out.println("公鸡"+x+"只,"+"母鸡"+y+"只,"+"小鸡"+z+"只");
13              }
14 
15     }
16 
17 }

1  package bbb;
 2 public class Chongfu {
 3   
 4       public static void main(String[] args) 
 5       {
 6          int i,j,k,t=0,m=0;
 7          for(i=1;i<=4;i++)
 8            for(j=1;j<=4;j++)
 9                if(i!=j)
10                    for(k=1;k<=4;k++)
11                         if(k!=i&&k!=j)
12                             
13                         {   m++;
14                             System.out.print(i*100+j*10+k+"  ");
15                              if(m%8==0)
16                                  System.out.println();
17                              t++;
18                              
19                         }
20         System.out.println("不重复的数一共有"+t+"个");
21      }
22  }

 1 package bbb;
 2 import java.util.Scanner;
 3 public class Shusu {
 4 
 5     public static void main(String[] args) {
 6           int x,i;
 7           Scanner in =new Scanner(System.in);
 8             x=in.nextInt();
 9             for(i=2;i<x;i++)
10                 if(x%2==0)
11                     {
12                     System.out.println(x+"不是素数");
13                     break;
14                     }
15               if(i>=x)  System.out.println(x+"不是素数");
16 
17     }
18 
19 }