#include <iostream> 

struct Foo
{
  int a;
  int b;
  int c;
};

struct Bar
{
  int x;
  Foo f;
  int y;
};

int main(int argc, char** argv) 
{ 
  // initialize the members
  Bar r = {1, {2, 3, 4}, 5};
  std::cout << r.x << " ";
  std::cout << r.f.a << " ";
  std::cout << r.f.b << " ";
  std::cout << r.f.c << " ";
  std::cout << r.y << " ";
  std::cout << "\n" << std::endl;

  // zero initialize the structure
  Bar r2 = {};
  std::cout << r2.x << " ";
  std::cout << r2.f.a << " ";
  std::cout << r2.f.b << " ";
  std::cout << r2.f.c << " ";
  std::cout << r2.y << " ";
  std::cout << "\n" << std::endl;

  // initialize first 3 members and 0 initialize the remaining elements
  int a1[8] = { 1, 2, 3 };
  for (int i = 0; i < 8 ; ++i)
  {
    std::cout << a1[i] << " ";
  }
  std::cout << "\n" << std::endl;

  // zero initialize the entire array
  int a2[5][5] = {  };
  for (int i = 0; i < 25 ; ++i)
  {
    std::cout << a2[i/5][i%5] << " ";
  }
  std::cout << "\n" << std::endl;

  return 0; 
}