//C++ 11
// constExpression.cpp
#include <iostream>
constexpr int square(int x) { return x * x; }
constexpr int squareToSquare(int x){ return square(square(x));}
int main() {
  std::cout << std::endl;
  int a = 10;
  static_assert(square(a) == 100, "you calculated it wrong");
  static_assert(squareToSquare(10) == 10000 , "you calculated it wrong");
  std::cout<< "square(10)= " << square(10) << std::endl;
  std::cout<< "squareToSquare(10)= " << squareToSquare(10) << std::endl;
  
  constexpr int constExpr= square(10);
  int arrayClassic[100];
  int arrayNewWithConstExpression[constExpr];
  int arrayNewWithConstExpressioFunction[square(10)];
  std::cout << std::endl;
}