模拟操作系统的内存分配程序。可以添加、修改、删除作业，设置作业的执行顺序，并按照设定好的顺序为作业分配内存空间。-Simulation of the operating system memory allocation process. You can add, modify, delete operation, set the execution order of operations, and in accordance with predetermined order of operations to allocate memory space.