Algorithm to display a 3 digit number in words [ISC]

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Algorithm

Start.
Enter
a number, of maximum three digits. (n ß
Input from user)
Calculate
the length of ‘n’.
If the
length is more than three, goto step 5, otherwise goto step 6.
Print
message “"Wrong input only three digit number allowed". Goto
step 27.
Check that wherther the number is greater
or less than zero.
If it
is greater than zero, print “Positive”, otherwise print “Negative”.
Change
the number ‘n’ to positive by calculating its absolute value and assigning
it again to ‘n’.
Define
an array “af” containing twenty words from “zero” to “nineteen”.
Define
an array “as” containing nine elements with first elements as null
character and rest of the elements as multiples of ten from Twenty to
Ninety.
Check
if the number is less than twenty, if yes goto step 16.
Check
if number is equal to twenty, if yes goto step 17.
Check
if number is less than hundred, if
yes goto step18
Check
if number is equal to hundred, if yes goto step 21.
Otherwise
goto step 22.
Print
nth index of array “af”. Goto step 27.
Print
“Twenty”. Goto step 27.
Extract
last digit of “n” and store it in integer type variable
“x”.
Divide
n by 10 and store it in integer type variable y.
Print
y-1 th index of as followed by space and x th index if af. Goto step 27.
Print
“Hundred”. Goto step 27.
Extract
last digit of n and store it in
integer type variable ‘x’.
Divide
n by 10 and store it in integer type variable ‘y’.
Extract
last digit of y and store it in variable ‘z’.
Divide
y by 10 and store it in variable ‘p’.
Print
p th index of af followed by “hundred” followed by z-1 th index of as followed by x th
index of af. Goto step 27.
Stop.