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test1.pl
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test1.pl
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%Base case, stops when N columns are the same as desired grid size
%Draws the numbers for the columns at the bottom of the board
draw_board(N, N, _) :-
nl,
draw_col_num(N, -1),
nl.
%Intitial case, draw the numbers for the columns
draw_board(N, -1, Route) :-
draw_col_num(N, -1),
draw_board(N, 0, Route).
%Recursive predicate that draws N rows and columns
%First time this is called N must be 0
draw_board(GridSize, X, Route) :-
draw_row(GridSize, X, -1, Route),
NextX is X + 1,
draw_board(GridSize, NextX, Route).
%Draw row numbers to the right of the board less than 10
draw_row(Y, X, Y, _) :-
NextX is Y - X,
NextX =< 9,
NextX > 0,
write(' | '), write(NextX),
nl.
%Draw row numbers to the right of the board greater than 9
draw_row(Y, X, Y, _) :-
NextX is Y - X,
NextX >= 10,
write(' | '), write(NextX),
nl.
%Draw row numbers to the left of the board that are less than 10
draw_row(GridSize, X, -1, Route) :-
NextX is GridSize - X,
NextX =< 9,
NextX > 0,
write(NextX), write(' | '),
draw_row(GridSize, X, 0, Route).
%Draw numbers numbers to the left of the board that are greater than 9
draw_row(GridSize, X, -1, Route) :-
NextX is GridSize - X,
NextX >= 10,
write(NextX), write(' | '),
draw_row(GridSize, X, 0, Route).
%Draw the non-visited and non-crevice spaces on the board
draw_row(GridSize, X, Y, Route) :-
RealX is GridSize - X,
RealX > 0,
RealY is Y + 1,
\+ boundary(RealX, RealY),
\+ route_member([RealX, RealY], Route),
NextY is Y + 1,
NextY =< GridSize,
write(' _ '),
draw_row(GridSize, X, NextY, Route).
%Draw the crevices
draw_row(GridSize, X, Y, Route) :-
RealX is GridSize - X,
RealX > 0,
RealY is Y + 1,
\+ route_member([RealX, RealY], Route),
boundary(RealX, RealY),
NextY is Y + 1,
NextY =< GridSize,
write(' * '),
draw_row(GridSize, X, NextY, Route).
%Draw the route
draw_row(GridSize, X, Y, Route) :-
RealX is GridSize - X,
RealX > 0,
RealY is Y + 1,
\+ boundary(RealX, RealY),
route_member([RealX, RealY], Route),
NextY is Y + 1,
NextY =< GridSize,
write(' X '),
draw_row(GridSize, X, NextY, Route).
%Base case for the column number boundary drawer
draw_col_num(N, N):-
nl.
%Initializer for column number drawer
draw_col_num(N, -1) :-
write(' '),
draw_col_num(N, 0).
%Recursive column numberer for number less than 11
draw_col_num(N, Y) :-
NextY is Y + 1,
NextY =< 10,
write(' '), write(NextY), write(' '),
draw_col_num(N, NextY).
%Recursive column numberer for numbers greater than 10
draw_col_num(N, Y) :-
NextY is Y + 1,
NextY > 10,
NextY =< N,
write(NextY), write(' '),
draw_col_num(N, NextY).