某旅馆有n 个等级的房间，第i 等级有个房间，每个等级有个床位（1≤I≤n）。试模拟旅馆管理系统中床位分配 和回收的功能，设计能为单个旅客分配床位，在其离店便回收床位（供下次分配）的算法。 -A hotel has n levels of the room, the first grade i have a room, each grade has a bed (1 ≤ I ≤ n). Simulation test bed hotel management system distrib