How to modify a file which contains a vector?

eusko

For example I have a file vector.dat with a vector. I need to modify some elements in the middle of the vector.
I try to do it with the functions write and seekp, but then the rest of data is lost.
How to do it in a proper way?

Banfa

You are probably opening the file in the wrong mode so that it gets truncated or something like that.

eusko

Look, i do like this
ofstream outCredit( "in.dat", ios::binary );
So maybe there is a special ios-mode to avoid this truncation?

eusko

Solved. I need to declare it as fstream. Thanks!!!

How to modify a file which contains a vector?

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