// checkTime.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "windows.h"
#include "time.h"
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <process.h>
#include <string.h>
// DWORD WINAPI GetTickCount(void);
static char * GetTimeString()
{
		SYSTEMTIME st;
		GetLocalTime(&st);
		static char to[100];
		sprintf (to,"%d-%02d-%02d %02d:%02d:%02d.%03d", (int)st.wYear, (int)st.wMonth,(int)st.wDay,(int)st.wHour,
			(int)st.wMinute,(int)st.wSecond,(int) st.wMilliseconds);
		return to;
}
int _tmain(int argc, _TCHAR* argv[])
{
	DWORD lastTime=GetTickCount();
	DWORD actTime;
	DWORD diff;
 LONGLONG g_Frequency, g_CurrentCount, g_LastCount; 
 //Frequenz holen 
 if (!QueryPerformanceFrequency((LARGE_INTEGER*)&g_Frequency)) 
 printf("PerformanceCounter nicht vorhanden\n");
	printf("Frequency: %llx\n", g_Frequency);
	QueryPerformanceCounter((LARGE_INTEGER*)&g_LastCount); 
	
	long overflow=0xFFFFFFFF / g_Frequency;
	printf("%s\n",GetTimeString());
	printf ("Overflow from lower part are %ld seconds\n",overflow);
	printf ("ActTime=%lx\n",lastTime);
	printf ("ActPerfTime=%llx\n",g_LastCount);
	for (;;) 
	{
		Sleep(1000);
		actTime=GetTickCount();
		diff = actTime-lastTime;
		
		if (diff> 2000) {
			printf("%s: Error %ld\n", GetTimeString(), diff);
			printf ("ActTime=%lx\n",actTime);
		}
		lastTime=actTime;
		QueryPerformanceCounter((LARGE_INTEGER*)&g_CurrentCount); 
		double dTimeDiff = (((double)(g_CurrentCount-g_LastCount))/((double)g_Frequency)); 
		if (dTimeDiff> 2 &#124;&#124; dTimeDiff < 0) {
			printf("%s: PerfError %f\n", GetTimeString(), dTimeDiff);
			printf ("ActPerfTime=%llx\n",g_CurrentCount);
		}
		g_LastCount=g_CurrentCount;
	}
	return 0;
}
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