程序代码：

    
        string fn = "ReadMe.txt";
    ifstream fin(fn.c_str(), ios_base::in);  
    if(!fin.is_open()) 
    {
        cerr<<"can't open "<<fn<<endl;
        exit(EXIT_FAILURE);
    } 
    char buf[1024];
    int readSize = 0;
    while (!fin.eof())
    {
        memset(buf, 0, sizeof(buf));
        fin.getline(buf, sizeof(buf));
        cout << buf << endl;
    }
    fin.close();