:Python Program: Or C++

contain a function called convert() that takes

a quantity, and a unit 'source' parameters, and

destination unit parameter.

For example: (1, "parsec", "kilometer") returns 30860000000000

For example: (45, "degrees", "radian") returns .7853985

convert() will return a quantity that you have

calculated . Note, you should not assume

the units are "set". You should create an array

(or dictionary) for all units. Poor programming

will produce a convert() function that is full of

conditional statements instead of one simple math

calculation.

Conversion between units is as follows:

parsec to lightyear (1 parsec = 3.26 lightyears)

lightyear to kilometer (1 lightyear = 9.461 x 10^12 kilometers)

xlarn to parsec (1 xlarn = 6.3762 parsec)

degree to radian (1 degree = 0.0174533 radian)

radian to xarnian (1 radian = 100 xarnian)

xarnian to degree (1 xarnian = .572958 degree)