how to set or initialize default value for all elements of a table or 2d array or multdimentional array

Question

I want to set a default nonzero value for all elements of a table or 2d array. array[size]={12} sets first elements only 12 and others are all 0 in a row.But fill(array,arra

Answer 1

A solution (not really elegant, I know) can be

for ( auto & row : arra )
   for ( auto & elem : row )
      elem = 45;

or, using std::fill()

for ( auto & row : arra )
   std::fill(std::begin(row), std::end(row), 45);

---- EDIT ----

Full example

#include 

int main ()
 {
   int a[10][10];

   // mode A
   for ( auto & row : a )
      for ( auto & elem : row )
         elem = 45;

   // mode B
   for ( auto & row : a )
      std::fill(std::begin(row), std::end(row), 47);

   for ( int i = 0 ; i < 10 ; ++i ) 
    {
      for ( int j = 0 ; j < 10 ; ++j )
         std::cout << '[' << a[i][j] << ']';

      std::cout << '\n';
    }

   return 0;
 }