Thread: beginner question recursive functions c memory problem ?

i tried to compile the code c++0x was proposing, and, apart from the missing semicolon after long a, i got the following error messages:

Code:

: In function 'push':
:11: error: invalid type argument of '->'
:12: warning: incompatible implicit declaration of built-in function 'malloc'
:In function 'pop':
:21: error: invalid type argument of '->'

anyone know why?

thx very much.