title: Saving functions in a class C++
body: <p>I am a total noob.</p>
  
  <p>I have created functions for int to string and string to int conversion.</p>
  
  <p>I want to save them so I can use them in any program, so I can call them like <code>#include &lt;iostream&gt;</code></p>
  
  <p>Do I do this by creating a class ( which then has no private member variables?)</p>
  
  <p>and if I do it as a class how do I use functions without creating objects?</p>
  
  <p>Basically I want to create my own cmath or string sort of thing but I don't even know what to call it to find out how to make it.</p>