text: #include "vars.h"
  #include<string>
  
  using std::string;
  
  int main() 
  {
  	string name = "John";
  
  	display_number(10);
  
  	int num = 5;
  	cout << square_number(num) << "\n";
  
  	cout << num << "\n";
  
  	int num1 = square_number(5);
  
  	return 0;
  }