text: #include <iostream>
  #include "3__vars.cpp"
  using namespace std;
  
  
  int main () {
      cout << "pi is " << PI << endl;
      cout << "name is " << NAME << endl;
      cout << "square of 2 is " << square(2) << endl;
      cout << "cube of 10 is " << cube(10) << endl;
      return 0;
  }