code to write out combinations e.g. (10 choose 3)

Hi,

Related to my last question is the following. Does anyone have code to write out every possible combination (not permutation) from a given number X taken out Y (X choose Y)?
Any help appreciated. i just cannot seem to get the appropriate number written out.
Thx
Marc

 

combination

Try this link
http://en.wikipedia.org/wiki/Mathematical_combination

as an example - to choose 3 out of 10 you have :

10! / (3! * (10-3)!) = 3628800/(6*5040) = 120

(calculated by SCalculator , since the only code you need is Factorial function, you can find it there.)

 

combination

Here is conceptual code, not debugged:
sub combination(x,y)
a = 1
for i = 1 to x
a = a*i
next
b = 1
for i = 1 to y
b=b*i
next
c=1
for i = 1 to x-y
c= c*i
next
return a/(b*c)
end sub

 

thnx guys, but I need the code for writing out the different combinations.

 

Okay, I took the challenge !
see the attached program, both displaying and storing in a file.
fill the a out of b and press go. you will get the number of combinations and the last one, and you can brouse up and down.