C++ File I/O practice

// ConsoleApplication1.cpp : 定義主控台應用程式的進入點。
//

#include "stdafx.h"
#include<iostream>
#include<fstream>
#include<string>
using namespace std;

void main()
{
    fstream file1;
    string infile1;
    file1.open("c:\\test.txt", ios_base::in);
    if (!file1)
        cout << "檔案開啟失敗\n";
    else
    {
        int counter=0;
        while (!file1.eof())   //若到達檔案結尾則”file>>str”將 傳回0， 跳出while回圈

        {
            char str;
            file1.get(str);
            if (!file1.good())  //如果讀取的字元是不正常的則跳出迴圈
                break;
            if (str == '3')
                counter++;
            infile1 += str;
        }
        cout <<"讀取到:\n"<< infile1 << endl << endl;
        fstream file2;
        file2.open("c:\\test2.txt", ios_base::out);
        if (file2)
        {
            file2 << infile1;
        }
        cout << "複製完畢\n共有 "<<counter<<" 個3\n";

    }
}