How to get size c++ dynamic array

Question

I\'m studying C++ and I need to create structure Airplane and work with it.

My structure Airplane.h

#include \"stdafx.         


        

Answer 1

you could probably make a dynamic array with 0 items, make an int counter, make a while loop with getline as a statement, while (getline(cin, string_var) != SomeText) /* SomeText = some kind of text so the user show you there are not going to be any more inputs*/, what you were going to do it in the for do it in the while and at the end of the while increase the counter by one, i++. And about the access to the array, if your dynamic array has 0 items, then SomeDynamicArray[1].something = SomeValue will just add a second item to the array and the "something" of that item will be equal to SomeValue.

type *ArrayPointer = new type[0];
string StringVar;
int i = 0;
while (getline(cin, StringVar) != "Text that show there are not going to be any more inputs") {
     /*code*/
     i++;
} 

idk if it will work on your case, but try it if you want. Also, about everyone saying about vectors, as I know at least, vectors are slower and spend more memory, bcs they double there size instead of just increasing it every time needed. I hope I will be some help.