BG> void invert(float *f)
 BG> {
 BG>         *f=1/*f;
 BG> }
This won't work because of C parsing rules - the longest possible token wins. 
 In this case, the longest possible token is "/*" TOGETHER.  To get what you 
want, you MUST put a space between the / and the *, or otherwise split them 
(i.e., use parenthesis).
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