改程序采用C++语言实现首次适应算法和最佳适应算法的动态分区分配过程alloc()和回收过程free()。其中，空闲分区通过空闲分区链表来管理，在进行内存分配时，系统优先使用空闲区低端的空间。-The program uses the C++ language for the first time to adapt to the dynamic algorithm and the best-fit algorithm partition process alloc () and recovery process of the free (). Among them, the idle partition through the idle partition linked list to manage during memory allocation, priority use of the lower end of the free zone of space.