设计并实现Unix的“time”命令。“mytime”命令通过命令行参数接受要运行的程序，创建一个独立的进程来运行该程序，并记录程序运行的时间。

在Windows下实现:

• 　　使用CreateProcess()来创建进程

• 　　使用WaitForSingleObject()在“mytime”命令和新创建的进程之间同步

• 　　调用GetSystemTime()来获取时间

-Design and implementation of the Unix " time"　command. " Mytime"　command via the command line parameter accepts the program to run, create a separate process to run the program, and recording program to run. Under Windows: •　Using CreateProcess () to create a process •　Use WaitForSingleObject () in " mytime"　command and the newly created synchronization between processes •　Call GetSystemTime () to get the time