Non-repeating random number generator

Question

I\'d like to make a number generator that does not repeat the number it has given out already (C++).

All I know is:

int randomgenerator(){
  int ran         


        

Answer 1

Sounds like you essentially want to shuffle a deck of cards (in this case, the "cards" being the questions, or question numbers).

In C++, I would do:

#include 
#include 

std::vector question_numbers;
for (unsigned int i = 0; i < 10; ++i)
    question_numbers.push_back(i+1);
std::random_shuffle(question_numbers.begin(), question_numbers.end());

// now dole out the questions based on the shuffled numbers

You do not have to hand out all of the questions, any more than you have to deal out a whole deck of cards every time you play a game. You can, of course, but there's no such requirement.