系统的已运行时间（单位:秒）: C C++

/*!**********************************************************
* @fn      GetSysRunTime()
* @brief   获取系统已运行时间
* @return  系统的已运行时间（单位:秒）
*************************************************************/
unsigned int GetSysRunTime()
{
	unsigned int dwSysRunTime = 0;

#ifdef _LINUX_

	FILE *pfFile = fopen("/proc/uptime", "r");
	if(NULL != pfFile)
	{
		float fRunTime, fIdleTime;

		fscanf(pfFile, "%f %f", &fRunTime, &fIdleTime); //fRunTime:系统运行时间 fIdleTime:系统空闲时间
		dwSysRunTime = (unsigned int)fRunTime;
		fclose(pfFile);
	}

#endif

#ifdef WIN32

	dwSysRunTime = GetTickCount() / CLOCKS_PER_SEC;

#endif

	return dwSysRunTime;
}