Pseudo-random numbers/Middle-square method

Pseudo-random numbers/Middle-square method
You are encouraged to solve this task according to the task description, using any language you may know.

Middle-square_method Generator

The Method

To generate a sequence of n-digit pseudorandom numbers, an n-digit starting value is created and squared, producing a 2n-digit number. If the result has fewer than 2n digits, leading zeroes are added to compensate. The middle n digits of the result would be the next number in the sequence and returned as the result. This process is then repeated to generate more numbers.

Pseudo code

var seed = 675248
function random()
    var s = str(seed * seed) 'str: turn a number into string
    do while not len(s) = 12
        s = "0" + s          'add zeroes before the string
    end do
    seed = val(mid(s, 4, 6)) 'mid: string variable, start, length
                             'val: turn a string into number
    return seed
end function

Middle-square method use

for i = 1 to 5
    print random()
end for

Task

• Generate a class/set of functions that generates pseudo-random

numbers (6 digits) as shown above.

• Show the first five integers generated with the seed 675248 as shown above.

• Show your output here, on this page.

Python

You don't actually have to use strings, but should you so desire the commented-out line gives exactly the same results. Output matches Python.

with javascript_semantics
integer seed = 675248
function random()
    seed = remainder(floor(seed*seed/1000),1e6)
--  seed = to_integer(sprintf("%012d",seed*seed)[4..9])
    return seed
end function
for i=1 to 5 do
    ?random()
end for

Python

<lang python>seed = 675248 def random():

   global seed
   s = str(seed ** 2)
   while len(s) != 12:
       s = "0" + s
   seed = int(s[3:9])
   return seed

for i in range(0,5):

   print(random())

</lang>

Output:

959861
333139
981593
524817
432883