open and write to existing fstream without overwrite/clearing in C++

Question

I have an existing txt file, I want to be able to write stuff to it (on the next line) without modifying the existing contents. What's a good way to do this?

#include <iostream>
ofstream myfile ("ex.txt");

seems to clear all the existing text.

I recommend you read more about the open function, or the constructor. — Some programmer dude
– Some programmer dude, Commented Aug 1, 2012 at 6:55

jahhaj · Accepted Answer · 2012-08-01 06:55:56Z

2

ofstream myfile ("ex.txt", ios_base::app); will open a file in append mode. Each write operation will append to the existing contents.

answered Aug 1, 2012 at 6:55

jahhaj

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mathematician1975 · Accepted Answer · 2012-08-01 06:56:05Z

1

Open the file using the ios_base::app flag

answered Aug 1, 2012 at 6:56

mathematician1975

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