HP Integrity NonStop J-Series - Manual (Page 243)

the hour and once to extract the minute. This is an expensive operation. If you expect to work often
with the components of a time or date, you may be better off disassembling the time only once:
RWTime now = RWTime::now();
struct tm tmbuf;
now.extract(&tmbuf);
const RWLocale& here = RWLocale::global(); // the default
// global locale
cout << here.asString(&tmbuf, 'H') << ":"
<< here.asString(&tmbuf, 'M'); << endl;
Please note that if you work with years before 1901 or after 2037, you can't use RWTime because it
does not have the required range. [30] You can use RWLocale to perform conversions for any time or
date because struct tm operations are not so restricted.
Numbers
RWLocale also provides you with an interface for conversions between strings and numbers, both
integers and floating point values. RWLocaleSnapshot implements this interface, providing the full
range of capabilities defined by the Standard C Library type struct lconv. The capabilities include
using appropriate digit group separators, decimal "point", and currency notation. When converting
from strings, RWLocaleSnapshot allows and checks the same digit group separators.
Unfortunately, stream operations of this class are clumsier than we might like, since the standard
iostream library provides definitions for number insertion and extraction operators which cannot be
overridden. Instead, we can use
RWCString functions directly:
RWLocaleSnapshot french("fr");
double f = 1234567.89;
long i = 987654;
RWCString fs = french.asString(f, 2);
RWCString is = french.asString(i);
if (french.stringToNum(fs, &f) &&
french.stringToNum(is, &i)) // verify conversion
cout << "C:\t" << f << "\t" << i << endl
<< "French:\t" << fs << "\t" << is << endl;
Since the French use periods for digit group separators, and commas to separate the integer from the
fraction part of a number, this code might display as:
C: 1.234567e+07 987654
French: 1.234.567,89 987.654
You will notice that numbers with digit group separators are easier to read.
Currency
Currency conversions are trickier than number conversions, mainly because there is no standard way
to represent monetary values in a computer. We have adopted the convention that such values
represent an integral number of the smallest unit of currency in use. For example, to represent a