[RESOLVED] is there any problem if I set a char to '\0' within a string?

[monarch_dodra]

You can do it, but you are undermining the system. Passing the string as an array to a C-Style API will break the API. You may have weird behavior when putting the string in a stream.

Strings hold char, but they are really supposed to represent text. If you just want a container of char, consider using a vector<char> instead. The interface will be better adapted, and your code less confusing.