百钱买百鸡

鸡翁一，值钱五；鸡母一，值钱三；鸡雏三，值钱一。

百钱买百鸡，求鸡翁，鸡母，鸡雏各几何？

  1: //百鸡问题 
  2: /*
  3:  jw*15 + jm*9 + jc = 300
  4:  jw + jm + jc = 100
  5:  ->
  6:  jc = 100 - jw - jm
  7:  7jw + 4jm = 100
  8:  */
  9: public class t2_11{
 10:   public static void main(String argv[]){
 11:     int jw,jm,jc;
 12:     for(jw=0;jw<=20;jw++)
 13:     {
 14:       jm = (100-7*jw)%4;
 15:       if(jm!=0)
 16:         continue;
 17:       jm = (100-7*jw)/4;
 18:       if(jm<0)
 19:         continue;
 20:       jc = 100-jw-jm;
 21:       System.out.println("jw = "+jw+" jm = "+jm+" jc = "+jc);
 22:     }
 23:     
 24:   }
 25: }