C++ 進度條的另一種表示

progressbar.h

#pragma once
#include <iostream>
#include <algorithm>
#include <tchar.h>

typedef int(*MyProgress)(double dfComplete, const char *pszMessage, void *  pProgressArg);//聲明函數指針

int Progress(double dfComplete, const char *pszMessage, void * pProgressArg);

int Progress(double dfComplete, const char *pszMessage, void * pProgressArg)
{

	int nThisTick = (std::min)(40, (std::max)(0, static_cast<int>(dfComplete * 40.0)));
	// Have we started a new progress run?
	static int nLastTick = -1;
	if (nThisTick < nLastTick && nLastTick >= 39)
		nLastTick = -1;
	if (nThisTick <= nLastTick)
		return true;
	while (nThisTick > nLastTick)
	{
		++nLastTick;
		if (nLastTick % 4 == 0)
			fprintf(stdout, "%d", (nLastTick / 4) * 10);
		else
			fprintf(stdout, ".");
	}
	if (nThisTick == 40)
		fprintf(stdout, " - done.\n");
	else
		fflush(stdout);
	return true;
}

測試

#include <iostream>
#include<Windows.h>
#include "progressbar.h"
using namespace std;

void print(int Size, MyProgress callback, void * pProgressArg);

int _tmain(int argc, _TCHAR* argv[])
{
	void * pProgressArg = NULL;
	int nYSize = 10;
	
	print(nYSize, Progress, pProgressArg);

	return 0;
}

void print(int Size, MyProgress callback, void * pProgressArg)
{
	for (int i = 0; i < Size; i++)
	{
		Sleep(1000);
		callback( ((i + 1) / (double)Size),
			"", pProgressArg);//
		
	}
}