Code to write a C template file
We need to be more defensive in these areas:


malloc() and family can return a null pointer.
scanf() and family can return fewer than requested conversions.


Additionally, there's no need to cast the result of malloc() - if you've correctly included &lt;stdlib.h&gt;, then it returns a void*, which is assignable to any pointer type.

Writing the unnecessary cast makes the code harder to review, because all casts indicate areas that need close attention by the reviewer.