//啤酒两元1瓶，四个瓶盖换1瓶，两个空瓶换1瓶，问10块钱可以喝几瓶？
int pj; //啤酒
int pg; //瓶盖
int kp; //空瓶            
int hpj; //换的啤酒
int money = 10; //金钱
pj = money / 2; //啤酒=10/2，啤酒为5瓶
pg = pj; //瓶盖5个
kp = pj; //空瓶5个
while (pg / 4 != 0 || kp / 2 != 0)
{
    hpj = (pg / 4) + (kp / 2);
    pg = (pg % 4) + hpj;
    kp = (kp % 2) + hpj;
    pj += hpj;
}
Console.WriteLine("啤酒两元1瓶，四个瓶盖换1瓶，两个空瓶换1瓶，问10块钱可以喝：{0}瓶", pj);
Console.ReadKey();