百錢買百雞

中國古代數學家張丘建在他的《算經》中提出了一個著名的“百錢買百雞問題”：一隻公雞值五錢，一隻母雞值三錢，三隻小雞值一錢，現在要用百錢買百雞，請問公雞、母雞、小雞各多少只？

 1 package program1;
 2 //百錢買百雞:一隻公雞五錢，一隻母雞三錢，三隻小雞一錢
 3 //公雞:cock,母雞:hen,小雞:chicken
 4 public class ch01 {
 5 
 6  public static void main(String[] args) {
 7   // TODO Auto-generated method stub
 8   int cock;
 9   int hen;
10   int chicken;
11   for( cock = 0 ; cock <= 20 ; cock ++ )
12   {
13    for( hen = 0 ; hen < 33 ; hen ++ )
14    {
15     for(chicken = 0 ; chicken <= 100 ; chicken ++ )
16     {
17 //     if((coke + hen + chicken == 100) && (5 * coke + 3 * hen + chicken / 3 == 100))
18 //犯錯1；chicken / 3 是對3取整，類型不對，應為小數     
19      if((cock + hen + chicken == 100) && (5 * cock + 3 * hen + chicken / 3.0 == 100))
20      {
21       System.out.println("母雞："+ cock + "公雞：" + hen + "小雞：" + chicken);
22      }
23     }
24    }
25   }
26  }

 1 package program1;
 2 //百錢買百雞:一隻公雞五錢，一隻母雞三錢，三隻小雞一錢
 3 //公雞:cock,母雞:hen,小雞:chicken
 4 public class ch011 {
 5 
 6     public static void main(String[] args) {
 7         // TODO Auto-generated method stub
 8                 int cock ;
 9                 int hen  ;            
10                 for( cock = 0 ; cock <= 20 ; cock ++ )
11                 {
12                     for( hen = 0 ; hen < 33 ; hen ++ )
13                     {    
14                         int chicken = 100 - cock - hen;
15                         if(5 * cock + 3 * hen + chicken / 3.0 == 100)
16                         {
17                             System.out.println("母雞："+ cock + "公雞：" + hen + "小雞：" + chicken);
18                         }
19                         
20                     }
21                 }
22     }
23 
24 }