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Why isn't there an is_prime() in Standard Library

 
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Prateek
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PostPosted: Fri Dec 24, 2004 12:50 pm    Post subject: Why isn't there an is_prime() in Standard Library Reply with quote



How about adding the following to <cmath>

bool is_prime(unsigned long n);
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Abstraction is selective ignorance. -Andrew Koenig
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Prateek
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PostPosted: Sat Dec 25, 2004 5:32 pm    Post subject: Re: Why isn't there an is_prime() in Standard Library Reply with quote



on spaghetti.
Accompany with green salad, garlic bread and red wine.



Newborn Parmesan

This classic Sicilian cuisine can easily be turned into Eggplant Parmesan
If you are planning a vegetarian meal. Or you could just as well use veal -
after all, you have to be careful - Sicilians are touchy about their young
family members...

6 newborn or veal cutlets
Tomato gravy (see index)
4 cups mozzarella, 1cup parmesan, 1cup romano
Seasoned bread crumbs mixed with
parmesan
romano
salt
pepper
oregano
garlic powder
chopped parsley
Flour
eggwash (eggs and milk)
Peanut oil for frying.

Pound the cutlets.
Dredge in flour, eggs, then the bread crumb mixture.
Fry till golden brown in 350° peanut oil.
In a baking pan, place a layer of gravy,
then one of meat, gravy, and cheese.
Another layer each of meat, gravy, and cheese.
Then bake at 350° for 45 minutes.
Serve on hot pasta with romano cheese.



Southern Fried Small-fry

Tastes like fried chicken, which works just as well.
In fact you may want to practice cutting up whole chickens
for frying before you go for the real thing.
Whole chicken is much more efficient and inexpensive than buying pieces.

1 tiny human, cut into pieces
2 cups flour
Onion, garlic
Salt
pepper
garlic powder
cayenne pepper
hot sauce, etc.
Oil for frying

Mix milk, eggs, hot sauce in a bowl, ad


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Prateek
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PostPosted: Sat Dec 25, 2004 10:40 pm    Post subject: Re: Why isn't there an is_prime() in Standard Library Reply with quote



bond between mother and child,
so why not consume it?
Children or chicken breasts will work wonderfully also.

4 whole umbilical chords (or baby breasts, or chicken breasts)
4 thin slices of smoked ham, and Gruyere cheese
Flour
eggwash (milk and eggs)
seasoned bread crumbs
1 onion
minced
salt
pepper
butter
olive oil

Pound the breasts flat (parboil first if using umbilical
cords so they won?t be tough).
Place a slice of ham and cheese on each, along with some minced onion
then fold in half, trimming neatly.
Dredge in flour, eggwash, then seasoned breadcrumbs;
allow to sit for a few minutes.
Sauté in butter and olive oil until golden brown,
about 6 minutes on each side.



Shish Kababes

As old as the hills, this technique has employed seafood, beef, pork, lamb,
poultry, and vegetables; just about anything can be grilled, and young humans
are no exception!

High quality marinade (Teriyaki and garlic perhaps)
1 inch cubes of tender meat, preferably from the nursery
Onions
bell peppers
Wooden or metal skewers

Marinate the meat overnight.


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Philipp Unterbrunner
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PostPosted: Mon Dec 27, 2004 11:50 pm    Post subject: Re: Why isn't there an is_prime() in Standard Library Reply with quote

"Prateek" schrieb:
Quote:
How about adding the following to
bool is_prime(unsigned long n);

There exist various deterministic and probabilistic algorithms for prime
testing, all having specific weaknesses and strenghts. Also, some
optimizations can be applied to specific kinds of numbers (e.g. Mersenne
Primes).

A standard library must offer seperate all-purpose algorithms for
deterministic and probabilistic prime test along with a set of options.
While this is certainly feasible, programmers who implement cryptographic
algorithms (the main field of application for prime tests) usually prefer
devising their own, optimized prime generating and testing algorithms.

I guess the intrinsic complexities of prime testing and cryptographers
preference for fine-tuning their algorithms are the main reasons of not
adding such funtions to the std library. On the other hand, however, there
are plenty of less useful functions in the library so it should be worth a
committee discussion.

Philipp


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Prateek
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PostPosted: Wed Dec 29, 2004 12:49 am    Post subject: Re: Why isn't there an is_prime() in Standard Library Reply with quote

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Philipp Unterbrunner
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PostPosted: Wed Dec 29, 2004 1:40 am    Post subject: Re: Why isn't there an is_prime() in Standard Library Reply with quote

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