Precision Math Software

[dISP]

Ok, I see.   Once a variable, say a floating decimal variable for example, is in the mpfr world, is there a function that can send the value of that variable back to the raw program.  Such that the value can be assigned to a non mpfr variable?

Basically the opposite transition of this:
d1=.52118
Call mpfr_init2(x, 166)
c = mpfr_set_flt(x, d1, 166)