#include <iostream>


int main()
{
	int runtime_value = 10;

	const int const_runtime_init = runtime_value;
	// OK, const_runtime_init is a const int initialized at runtime
	// constexpr int constexpr_runtime_init = runtime_value;
	// ERROR: runtime_value is not a constant expression

	const int const_compile_time_init = 5  ;
	// OK, const int initialized with a compile-time constant
	constexpr int constexpr_compile_time_init = 5 ;
	// OK, constexpr int initialized with a compile-time constant

	int arr1[const_compile_time_init];
	// OK, const_compile_time_init is a compile-time constant
	int arr2[constexpr_compile_time_init];
	// OK, constexpr_compile_time_init is a compile-time constant

	// int arr3[const_runtime_init];
	// ERROR: const_runtime_init might not be a compile-time constant

	  constexpr int array_size = 10  ;

	  // array_size is a compile-time constant
	  int arr[array_size];


  return 0 ;
}