CODEWITHSUNDEEP
c++visual-c++
Jennifer
Jennifer

Reputation: 115

Generate specific random number

I am trying to create a method that generates a random number from a specific selection of numbers, it must be either 0, 90, 180 or 270.

This is the method I have so far to generate a random number between a certain range, but I am not sure how to generate a random number from a specific selection.

int randomNum(int min, int max) {
    return rand() % max + min;
}

Upvotes: 1

Views: 695

Answers (1)

daysling
daysling

Reputation: 118

Umm, So as I think you're trying to choose a specific number in a array or so called a list of options, I've a quick example for you here. You can just create a array with all your options and make this method to return a value from the given array.

#include <iostream>
#include <stdlib.h>
#include <time.h>

int main ()
{
  srand ( time(NULL) ); //initialize the random seed
  

  const char arrayNum[4] = {'1', '3', '7', '9'};
  int RandIndex = rand() % 4; //generates a random number between 0 and 3
  cout << arrayNum[RandIndex];
}

More details - http://www.cplusplus.com/forum/beginner/26611/

Upvotes: 2

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