text: #include<iostream>
  #include"Header.h"
  #include<cstdlib>
  using namespace std;
  
  
  int main()
  {    
  	float x, y;
  	cin >> x >> y;
  	cout << add(x, y)<<endl;
  	cout << sub(x, y)<<endl;
  	cout << mul(x, y)<<endl;
  	cout << div(x, y);
  	system("pause");
  }