CODEWITHSUNDEEP
c++arraysmultidimensional-arrayrandom
flipps
flipps

Reputation: 154

How to get a random int from a multidimensional array in c++

I'm looking to get a random int from a 2d array like this:

static const int points[6][3] = { {2,3,4}, {11,12,13}, {14,15,16}, {17,0,1}, {8,9,10}, {5,6,7} };

The output could be any number within the array.

Upvotes: 0

Views: 122

Answers (1)

Andy Sukowski-Bang
Andy Sukowski-Bang

Reputation: 1420

You can use rand from <stdlib.h> in combination with time from <time.h>:

srand(time(NULL));
/* get random element */
int y = rand() % 6;
int x = rand() % 3;
int r = points[y][x];

Alternatively you could use <random> which is preferable, as mentioned by jabaa in the comments:

std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<> distr(0, 5);
int y = distr(gen);
int x = distr(gen) % 3;
int r = points[y][x];

Upvotes: 1

Related Questions