floating point precision

dsmith dsmith at nomail.com
Wed Jan 11 15:51:41 PST 2012

How do you increase floating point precision beyond the default of 6?

double var = exp(-1.987654321123456789);

--> 0.137016

Assuming this result is only an output format issue and that operations are
still using double's 64 places, if var above is passed to a function, are all
64 places passed?  Must it be passed by reference to make it so?

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