Learn Abstract and Concrete with Small Basic

I wrote some programs for learning abstract and concrete.  At first I made a subroutine Average().  This routine calculates (a + b) / 2.  The concept average is a special (concrete) case of a wider concept.  Secondly, I made a subroutine Intermediate().  The concept of this routine is wider and more abstract than Average().  Intermediate() needs one more parameter k.  And if k = 0.5, the result is the same as Average().  The output of this program is:

 Average(a=10, b=20) = 15
Intermediate(a=10, b=20, k=0) = 10
Intermediate(a=10, b=20, k=0.25) = 12.50
Intermediate(a=10, b=20, k=0.50) = 15.00
Intermediate(a=10, b=20, k=0.75) = 17.50
Intermediate(a=10, b=20, k=1.00) = 20.00

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The code is here.

' Abstract and Concrete

' Version 0.1

' Copyright © 2016 Nonki Takahashi. The MIT License.

' Program ID HRX565

TextWindow``.`` Title `` = ``"Abstract and Concrete 0.1"

' average value

a `` = ``10

b `` = ``20

Average``(``)

TextWindow``.``WriteLine``(`` "Average(a=" `` + `` a `` + `` ", b=" `` + `` b `` + `` ") = " `` + ``c``)

' intermediate value

For `` k `` = `` 0 `` To `` 1 `` Step ``0.25

  ``Intermediate``(``)

  ``TextWindow``.``WriteLine``(`` "Intermediate(a=" `` + `` a `` + `` ", b=" `` + `` b `` + `` ", k=" `` + `` k `` + `` ") = " `` + ``c``)

EndFor

TextWindow``.``WriteLine``(``""``)

Sub ``Average

  ``' param a - the first value

  ``' param b - the second value

  ``' return c - the average of the given values

  `` c `` = ``(`` a `` + ``b`` ) `` / ``2

EndSub

Sub ``Intermediate

  ``' param a - the first value

  ``' param b - the second value

  ``' param k - ratio between a and b (0 ≦ k ≦ 1)

  ``' return c - the intermediate value between a and b

  `` c `` = `` a `` * ``(`` 1 `` - ``k`` ) `` + `` b `` * ``k

EndSub

I sometimes use the code like Intermediate(). So I also wrote application samples of Intermediate() for points and colors. The program ID is HRX565-0.  This program is also text base.

One more sample is HRX565-1.  This is a graphical demo animation program for these concepts.

• Anonymous
  November 14, 2016
  Hello NonkiVery nice demonstration of the way 2 colors in paint, would be mixed to get a new color.take a look on this web site: http://trycolors.com/ we can mix our colors online and it works almost identical to your program, for example I did a few tests:I mix red FF0000 with a 005B00 normally in oïl painting , green + red green gives brownish hue, and here's the result of your program: 7F5A00, so very real.Here is a visual and simplified version only for colors average and mixing:VWL407Also, I tried the ultimate test:black + white = middle gray000000 + 7F7F7F = FFFFFFand Yes PERFECT your program gives 7F7F7F!in decimal0 + 255 = (255/2 += 127.5)127 in hexadecimal gives 7FPerfect score !!
• Anonymous
  November 14, 2016
  The comment has been removed