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 Unix " time"　command. " Mytime"　command from the command line arguments accepted to run the program, create a separate process to run the program, and record the program running time. In the Windows implementation: ◦　Use CreateProcess () to create a process ◦　use WaitForSingleObject () between " mytime"　command and the newly created process synchronization ◦　call GetSystemTime () to get the time