要求采用某种分配算法(首次适应算法,循环首次适应算法,最佳适应算法,最差使用算法)实现可变存储算法的模拟操作,并实现回收空间的操作,这里要求使用链表的形式实现，建议采用最佳适应算法，首次适应算法-Some allocation algorithm (first-fit algorithm, the first cycle of adaptation algorithm, best-fit algorithm, the worst use of the algorithm) variable storage algorithm simulation operation and recovery space operations, use the list in the form of requirements here to achieve the recommended best-fit algorithm, first-fit algorithm