c ++ fstream关于在.txt文件的某些行上读取文件

Question

So I am very new to c++ and on an assignment I have for school I am making a program that uses fstream to put in userIds and passwords into a text file and I am not sure why this will not work when trying to confirm that the username and pass are correct

int login()
{
    fstream accountFile2;
    bool confirm;
    string userID;
    string accountPass;
    string IDConfirm;
    string PassConfirm;
    accountFile2.open("accountfile.txt",ios::in | ios::out);

    cout<<"Login!\n Enter your User ID: "<<endl;
    cin>>userID;
    cout<<"Please enter your account's password\n";
    cin>>accountPass;

    accountFile>>IDConfirm;
    accountFile>>PassConfirm;
    accountFile2.close();

    if((userID == IDConfirm) && (accountPass == PassConfirm))
    {
        confirm = 1;
        cout<<"success";
    }
    else
    {
        confirm =0;
        cout<<"invalid id/pass";
    }

    return confirm;
}

Answer 1

Assuming accountFile and accountFile2 is a typo, it works for me ( and the compiler ).

Double check that the file exists and contains right data. Also beware, that std::cin >> variable for variable of type std::string will read only one word (will stop reading when it finds whitespace). If you want to read whole line, use std::getline(std::cin, variable) instead.