CLOCK改进算法, 按照最多5块的内存分配情况，编程实现所选算法，动态输入访问内存的块号序列，输出置换结果； 测试：输入合法、非法的访问序列数据，检查程序的正确性和健壮性。-CLOCK algorithm improvements, in accordance with up to five memory allocation in programming to the selected algorithm, the dynamic input access memory block n