是这样的，有一道题，说是“百钱买百鸡”，5文钱可以买一只公鸡，3文钱买一只母鸡，1文钱买3只雏鸡，现在用100文钱买一百只鸡，那么各有公鸡母鸡雏鸡各多少只？

有没有人知道啊？

用三个嵌套循环！！！

public class HowManyChickens {

    public static void main(String[] args) {
        final int CHICKEN_NUMBER = 100;
        final int MONEY_NUMBER = 100;
        for (int cockNumber = 0; cockNumber < CHICKEN_NUMBER / 5 + 1; cockNumber++) {
            for (int henNumber = 0; henNumber < CHICKEN_NUMBER / 3 + 1; henNumber++) {
                for (int chikenNumber = 0; chikenNumber < CHICKEN_NUMBER; chikenNumber++) {
                    if (cockNumber     + henNumber     + chikenNumber     == CHICKEN_NUMBER
                     && cockNumber * 5 + henNumber * 3 + chikenNumber / 3 == MONEY_NUMBER
                     &&                                  chikenNumber % 3 == 0) {
                        System.out.println(cockNumber + " " + henNumber + " " + chikenNumber);
                    }
                }
            }
        }
    }
}

输出：
0 25 75
4 18 78
8 11 81
12 4 84

用两个循环也能解决

public class HowManyChickens2Loops {

    public static void main(String[] args) {
        final int CHICKEN_NUMBER = 100;
        final int MONEY_NUMBER = 100;
        for (int cockNumber = 0; cockNumber < CHICKEN_NUMBER / 5 + 1; cockNumber++) {
            for (int henNumber = 0; henNumber < CHICKEN_NUMBER / 3 + 1; henNumber++) {
                int chikenNumber = CHICKEN_NUMBER - cockNumber - henNumber;
                    if (cockNumber * 5 + henNumber * 3 + chikenNumber / 3 == MONEY_NUMBER
                     &&                                  chikenNumber % 3 == 0) {
                        System.out.println(cockNumber + " " + henNumber + " " + chikenNumber);
                    }
            }
        }
    }
}

输出：
和上面一样

上面好复杂
public class maiji {
    public static void main(String[] args){
        int gongji,muji,zhouji;
        for(int i=3;i<100;i++){
            gongji=4*i-100;
            muji=200-7*i;
            zhouji=3*i;
            if((gongji>=0)&&(muji>=0))
                System.out.println("公鸡"+gongji+"只，母鸡"+muji+"只，皱鸡"+zhouji+"只");
        }

    }
   
}

//说是“百钱买百鸡”，5文钱可以买一只公鸡
//3文钱买一只母鸡，1文钱买3只雏鸡，现在用100文钱买
//一百只鸡，那么各有公鸡母鸡雏鸡各多少只？
public class Maiji{
    public static void main(String[] args)
    {
      int x,y,z;//定义公鸡x、母鸡y、雏鸡z
      for(x=0;x<=20;x++)
         for(y=0;y<=33;y++)
         {
             z=100-x-y;
             if(5*x+3*y+z/3==100&&z%3==0)
            System.out.println("公鸡"+x+"只,母鸡"+y+"只,雏鸡"+z+"只");
         }
    }   
}

其实你应该问问度娘！！