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c++stdarray

Range based for with multi-dimensional std::array

Tried looking around for this but only found examples using built in array not std::array obj.

// array arr of size 5
array< array<int, 10>, 10> arr = { 0 };

srand((unsigned)time(0));

// initialize elements
for ()
{
    for()
    {
        item = rand() % 100 + 1;
    }
}

basic example trying to initialize 2D array obj to random values. im not sure what to put between the () of the for loops

Solution 
  • #include <array>
using namespace std;

// array arr of size 5
array< array<int, 10>, 10> arr;

int main() {
  // initialize elements
  for (auto & outer_array : arr)  
  {
      for(auto & inner_array : outer_array)
      {

      }
  }
}

    live: https://godbolt.org/g/6eLgBk