C语言下取得系统开机运行时间

利用timeGetTime函数

#include <stdio.h>
#include <windows.h>
#include <mmsystem.h>
#pragma comment(lib, "winmm.lib")

#define ONE_HOUR 3600000 // 1小时,等于3600000毫秒
#define ONE_MINUTE 60000 // 1分钟,等于60000毫秒
#define ONE_SECOND 1000  // 1秒钟,等于1000毫秒

void main()
{
 DWORD dwTime = timeGetTime();
 int nHour, nMinute, nSecond;

 nHour = dwTime / ONE_HOUR;
 if(nHour >= 1)
  dwTime -= nHour * ONE_HOUR;

 nMinute = dwTime / ONE_MINUTE;
 if(nMinute >= 1)
  dwTime -= nMinute * ONE_MINUTE;

 nSecond = dwTime / ONE_SECOND;

 printf("系统已经运行了: %d小时%d分钟%d秒\n", nHour, nMinute, nSecond);
}