Random and negative numbers

Question

I have to generate numbers in range [-100; +2000] in c++. How can I do this with rand if there is only positive numbers available? Are there any fast ways?<

Answer 1

Currently my C++ syntax is a little rusty, but you should write a function that takes two parameters: size and offset.

So you generate numbers with the given size as maximum value and afterwards add the (negative) offset to it.

The function would look like:

int GetRandom(int size, int offset = 0);

and would be called in your case with:

int myValue = GetRandom(2100, -100);