[RESOLVED] Just curious about std::string

[ulumulu]

Good evening lads.

OK. Lets say I make string

std::string dataBlock;
...........................................
//Fill that string with some data
.........................................

and presume that at some point I make

dataBlock[i] = '\0';

So what happens there. Does the compile see this place/address where was dataBlock[i] set to '\0', as empty memory and can writte there new stuff or not ?

I hope you understand what I mean. OC its g++.

[ZuK]

std::string can contain embedded '\0'. its just like any other char.
just make shure you never write to a location >= size().
Kurt

[ulumulu]

Ahh OK. Thank you Zuk

[Muthuveerappan]

couple of points:

1) '\0' is called the Null character.
2) This null character is used to mark the end of the ctring ( char [] or char * )
3) The std :: string doesn't treat null character any differently from any other char

Note - std :: string is a class with a lot of overloaded operator for easier use.

The following shows the above

#include <iostream>
#include <string>
using std :: cout;
using std :: endl;
using std :: string;

int main()
{
    string dataBlock = "abcdefh";

    dataBlock[2] = '\0';

    dataBlock[3] = 'z';

    cout << "dataBlock = " << dataBlock << endl;

    return(0);
}