Question

How to pick random index from an array with C++

Answer 1

#include <iostream>

int random_between_range(int first, int last) {
    int number =  rand() % ((last + 1) - first) + first;
      
    return number;
}
  
int main() {
    int arr[] = { 4, 9, 12, 90, 13, 0, 3, 97 };

    int size = sizeof(arr) / sizeof(arr[0]);

    srand(time(NULL));
     
    std::cout << random_between_range(0, size - 1);
}




/*
run:

3

*/

 

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