isomon::data::isonum2code — Low-level C function returning ISO alphabetic code given ISO numeric.
// In header: </home/castedo/src/isomon/currency_data.h> const char * isonum2code(isonum_t isonum);
Parameters:
isonum
ISO numeric code: is_isonum(isonum) is true
Returns:
ISO 3 letter alphabetic code if isonum found.