mirror of
https://github.com/diemheych/PrimeFORTH
synced 2024-12-26 09:58:13 +01:00
48 lines
731 B
Forth
48 lines
731 B
Forth
8 constant rr
|
|
variable ii
|
|
variable ss
|
|
variable xx
|
|
variable yy
|
|
create aa rr 1 + allot
|
|
: rclaa @ aa + @ ;
|
|
: stoaa @ aa + ! ;
|
|
|
|
: NQPRINT
|
|
1 II !
|
|
BEGIN
|
|
II RCLAA .
|
|
1 II +!
|
|
II @ XX @ 1 + = until
|
|
;
|
|
|
|
: NQCORE
|
|
0 SS !
|
|
0 XX !
|
|
BEGIN
|
|
1 XX +!
|
|
RR XX STOAA
|
|
BEGIN
|
|
1 SS +!
|
|
XX @ YY !
|
|
BEGIN YY @ DUP II ! 1 > IF
|
|
-1 YY +!
|
|
XX RCLAA YY RCLAA - DUP
|
|
0 = SWAP ABS XX @ YY @ - = OR IF
|
|
0 YY !
|
|
BEGIN XX RCLAA 1 - DUP XX STOAA DUP 0 = IF
|
|
-1 XX +!
|
|
then
|
|
0 <>
|
|
UNTIL
|
|
THEN
|
|
THEN
|
|
II @ 2 <
|
|
UNTIL
|
|
YY @ 1 = UNTIL
|
|
RR XX @ = UNTIL
|
|
;
|
|
|
|
: NQUEENS
|
|
NQCORE
|
|
NQPRINT
|
|
;
|