RosettaCodeData/Task/Mayan-numerals/BCPL/mayan-numerals.bcpl
2023-07-01 13:44:08 -04:00

70 lines
1.4 KiB
Text

get "libhdr"
let reads(v) be
$( v%0 := 0
$( let ch = rdch()
if ch = '*N' | ch = endstreamch break
v%0 := v%0 + 1
v%(v%0) := ch
$) repeat
$)
let digits(v) = valof
$( for i=1 to v%0
$( unless '0' <= v%i <= '9' resultis false
v%i := v%i - '0'
$)
resultis true
$)
let base20(v) be
$( let i = ?
for j=v%0-1 to 1 by -1
for i=1 to j
$( v%(i+1) := v%(i+1) + 10*(v%i & 1)
v%i := v%i >> 1
$)
i := 1
while v%i=0 & i<v%0 do i := i+1
for j=i to v%0 do v%(j-i+1) := v%j
v%0 := v%0-i+1
$)
let mayan(v) be
$( let border(n) be
$( for i=1 to n do writes("+----")
writes("+*N")
$)
let part(num, line) be
test num=0 do
writes(line=0 -> " @ ", " ")
or
$( num := num - line*5
writes(num<=0 -> " ",
num =1 -> " . ",
num =2 -> " .. ",
num =3 -> "... ",
num =4 -> "....",
"----")
$)
border(v%0)
for l=3 to 0 by -1
$( for d=1 to v%0
$( wrch('|')
part(v%d, l)
$)
writes("|*N")
$)
border(v%0)
$)
let start() be
$( let v = vec 1+255/BYTESPERWORD
$( writes("Number? ")
reads(v)
if v%0=0 finish
unless digits(v) loop
base20(v)
mayan(v)
$) repeat
$)