This one bit me today

[David Goodenough]

davidsen at crdos1.crd.ge.COM (Wm E Davidsen Jr) sez:
>   It pops up in macros from time to time. Consider:
> 	#define xavg(m) (sum+3)/m

If you don't write that as:

 	#define xavg(m) (sum+3)/(m)

you deserve what you get ....... let's see

	xavg(i+5);

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