C++ Primer Plus 5th Ed. Help

[TinkerTantrum]

Having trouble with Problem 1 on Chapter 5. How would I make a dynamic array that reads the integers in between two that the user types. For example: The user types in 1 and 10. I want the array to hold all int between 1 and 10.

{1, 2, 3, 4, 5,6 ,7, 8, 9, 10}.

I've been scouring the book, but cannot figure it out on my own.

[ciphermagi]

http://www.cplusplus.com/doc/tutorial/basic_io/
http://www.cplusplus.com/doc/tutorial/control/
http://www.cplusplus.com/reference/stl/vector/

[Albatross]

Would this site's page on dynamic allocation help?
http://cplusplus.com/doc/tutorial/dynamic/

After that, all you need is a for-loop with well-set boundaries to fill your array.

EDIT: Late. I suppose you could also use an std::vector as ciphermagi is proposing, though I think the point of the exercise was to learn how to use new[].

-Albatross

[ciphermagi]

I just figured that a vector would be more memory safe for a new user.

[Bench82]

std::vector is a much better idea for the sake of learning - Primer Plus is one of many beginner books which hasn't really been restructured since its early editions sometime in the 1990's - so it ends up teaching things in the wrong order (I think vectors are tucked away at the back somewhere rather than near the beginning where they should be).

[vlad from moscow]

If you were not a beginner I would advice you to write the following. Let a and b are two integer values, then the code will look like

std::vector v( b - a + 1 );

std::iota( v.begin(), v.end(), a );

Instead of this code maybe you should dynamically allocate memory for an array, and then in loop fill its elements with values.

int *v = new int[b - a + 1];

for ( int i = 0; i < b - a + 1; i++ ) v[i] = a + i;

[TinkerTantrum]

Okay I got it. Thank you all for your help.