VS2013下fstream如何使用

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

void main()
{
    fstream read;
    cout << "Now opening...\n";
    read.open("f1.txt", ios::in | ios::out | ios::app);
    if (!read)
    {
        cout << "ERROR!" << endl;
        system("pause");
        exit(1);
    }
    cout << "Opening file succeeded.\nNow getting info...\n";
    read.clear();
    char m[50];
    cout << "Now writing info...\n";
    read.write(m, 50);
    system("pause");
    read.close();
    system("pause");
}