Question

I have code of form below:

func1()
{
    fstream stud("student", fstream::in | fstream::out | fstream::app);
    stud << "sameer";
    stud.close();
}

func2()
{
    string name;
    fstream stud("student", fstream::in | fstream::out | fstream::app);
    stud >> name;
    stud.close();
}

here both functions are in same program but even if func1 has stud closed, on opening the file in func2 the changes are not reflected.

Answer 1

Get rid of fstream::app from your reader. With fstream::app, the file pointer starts at the end of the file, so you just read an empty string.