GURU NEEDED : macro SQUARE(x) for any type x

[bolega]

Basically, I have spent a few hours experimenting and searching on the
comp.lang.c/c++

Let me use SQR for brevity and saving line

Here are progressively refined macros :

#define SQR(x) ((x)*(x))

#define SQR(x) ({typedef xtype=x; xtype xval=x; xval*xval})  // NOTE,
closure or {} inside () is a valid idea in C, and thus no return is
needed.

this macro is given in several posts like

http://groups.google.com/group/comp.lang.lisp/browse_frm/thread/38ef2b108e325da6/e5fe657622e5595b?q=%22typedef+xtype%22&pli=1

there is a problem with typedef

Bolega