主存的分配和回收的实现与主存储器的管理方式有关的，通过本实验帮助学生理解在可变分区管理方式下应怎样实现主存空间的分配和回收。-Main memory allocation and recovery with the main memory management methods relating to the passage of this experiment to help students understand the variable partition management methods should be how to achieve the main memory space allocation and recycling.