C++读写二进制文件

#include<iostream>
#include<fstream>
#include<string>
#include<stdio.h>
using namespace std;
#define MAXBYTE     0xff  
int main()
{
	ifstream fin;
	ofstream fout;

	fin.open("D:\\q.mdb", ios_base::binary);
	if (!fin.is_open())
	{
		cout << "Error In Open..." << endl;
		return -1;
	}

	fout.open("D:\\CppFileOut.mdb", ios_base::binary);
	if (!fout.is_open())
	{
		cout << "Error Out Open..." << endl;
		return -1;
	}

	//获得文件的大小
	fin.seekg(0, ios::end);
	long fsize = fin.tellg();
	cout << "文件大小 : " << fsize << endl;

	//让文件的指针跑到文件头
	fin.seekg(0, ios::beg);
	
	long readLen = MAXBYTE;
	char szin[MAXBYTE] = { 0 };

	//文件大小比MAXBYTE小的情况下
	if (fsize <= MAXBYTE)
		readLen = fsize;

	while (fin.read(szin, readLen))
	{
		
		fout.write(szin, readLen);
		fsize -= MAXBYTE;
		if (fsize <= MAXBYTE)
		{
			readLen = fsize;
		}
		//当文件比MAXBYTE小的时候就会出现<0,读写一次跳出就好了，=0不能跳
		if (fsize < 0)
			break;
	}
	cout << "OK" << endl;
	
	fin.close();
	fout.close();
	return 0;
}