As of October, 2016, Embarcadero is offering a free release
of Delphi (Delphi
10.1 Berlin Starter Edition ). There
are a few restrictions, but it is a welcome step toward making
more programmers aware of the joys of Delphi. They do say
"Offer may be withdrawn at any time", so don't delay if you want
to check it out. Please use the
link to let me know if the link stops working.
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This is a Beginners level program using an array of numbers representing
cards to "deal" random "hands" of a given size.
Background & Techniques
It takes less than 50 lines of user written code to shuffle an
arbitrary "deck" of numbers and
"deal" them a number of "hands" with a number of "cards" per "hand" as specified
by the user.
It was prompted by a user who was trying to do this by randomly choosing card
from the deck without choosing duplicates. That is the hard and slow way to do
it. The easy way is to shuffle
the deck, randomly arrange the cards and then choosing "handsize" number at a
time from top to bottom to represent the hands.
The key trick is the 10 line "Shuffle" procedure which works from the end of an
array of numbers swapping each with a randomly chosen number whose position is
less than or equal to the position of the number being swapped.
Running/Exploring the Program
Suggestions for Further Explorations
|| For standard 52 card arrays it would
only take a few more lines of code to display card values as [A,2,3,4...10,J,Q,K]
suffixed by as [H,D,C,S]. E.g. 2S for 2 of Spades,
KD for King of Diamonds, etc.
|Original: August 05, 2012
February 18, 2016