Question

I need a char array that will dynamically change in size. I do not know how big it can get so preallocating is not an option. It could never get any bigger than 20 bytes 1 time, the next time it may get up to 5kb…

I want the allocation to be like a std vector.

I thought of using a std vector < char > but all those push backs seem like they waste time:

strVec.clear();
for(size_t i = 0; i < varLen; ++i)
{
   strVec.push_back(0);
}

Is this the best I can do or is there a way to add a bunch of items to a vector at once? Or maybe a better way to do this.

Thanks

Answer 1

std::vector doesn’t allocate memory every time you call push_back, but only when the size becomes bigger than the capacity