// fig06_10.cpp
// Initializing multidimensional arrays.
#include <iostream>
#include <array>
#include <vector>

constexpr size_t rows{2};
constexpr size_t columns{3};
void printArray(const std::array<std::array<int, columns>, rows>& a);

template <typename T>
void printArrayTemplate(const T& a);

int main() {
   constexpr std::array values1{std::array{1, 2, 3}, std::array{4, 5, 6}};
   constexpr std::array values2{std::array{1, 2, 3}, std::array{4, 5, 0}};

   constexpr std::array < std::array<int,3>, 2> values3{std::array{1, 2, 3}, std::array{4, 5, 6}};

   std::vector < std::vector<int>> values3_vec{std::vector<int>{1, 2, 3}, std::vector<int>{4, 5, 6}};

   std::cout << "values1 by row:\n";
   printArray(values1);

   std::cout << "\nvalues2 by row:\n";
   printArray(values2);

   std::cout << "\nvalues3 by row:\n";
   printArrayTemplate(values3);

   std::cout << "\nvalues3_vec by row:\n";
   printArrayTemplate(values3_vec);

}

// output array with two rows and three columns                 
void printArray(const std::array<std::array<int, columns>, rows>& a) {
   // loop through array's rows             
   for (const auto& row : a) {
      // loop through columns of current row                
      for (const auto& element : row) {
         std::cout << element << ' ';
      }

      std::cout << '\n'; // start new line of output             
   }
}

template <typename T>
void printArrayTemplate(const T& a) {
   // loop through array's rows             
   for (const auto& row : a) {
      // loop through columns of current row                
      for (const auto& element : row) {
         std::cout << element << ' ';
      }

      std::cout << '\n'; // start new line of output             
   }
}



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