c - malloc handling - identifier not found issue -

I am using Visual Studio to write the AC code.

This is the Malok code line I said to use:

  Root = (Kaura) maulok (shaped (kur));   
 This does not allow me to use it for the following error:  
  identifier not found   
 Tell me why this happens and how to fix it?  
 Thank you,   
 
 
 Please check whether you have  & lt; Stdlib.h & gt;  and  & lt; Malloc.h & gt; .