内存被划分成256块（页），用32位字长的字存放位示图表示其内存分配情况，为0的位表示该块尚未分配，为1的位表示该块已分配?

实习检查：



1、运行程序，由运行者给出文件名，该文件中存有内存目前状况的位示图的数据（0和1的文件）。（程序应做提示，界面友好）。

2、程序应读入数据，存放在相应的数据结构中。

3、显示友好的用户界面，由运行者输入内存申请（总块数）。

4、根据申请和位示图状态，为用户分配内存，并建立页表。

5、根据用户释放作业，同时释放其所占用的空间。

6、输出位示图和页表-Memory is 256 pages ） （ of a 32 bits long word for word of a graph show their memory allocations and 0 of the land has been allocated for a 1 bit block is distributed the examination? intern ： 1, to run the program, the file name given by the run, the file has a memory of the present situation shows the data （ 0 and 1 file ）. （ procedures should be done, and interfaces friendly ）. 2. procedures should be read into the data stored in the data structure. third, to show friendly user interface, and run the application by the memory blocks （ always ）. 4. according to application and a state, for example, and the establishment of a page table. five, according to the user releases the release of their work, a space. 6 and the output of a graph and