可变分区管理方式下采用首次适应算法实现主存分配和回收.能接受来自键盘或文件的空间申请及释放请求，能显示分区分配及回收后的内存布局情况。-Using a variable partition management algorithm for the first time to adapt to the main memory allocation and deallocation. Space applications and can accept requests the keyboard o