Flipping bits game: Difference between revisions

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m (→‎{{header|REXX}}: changed/added comments and whitespace, changed indentations.)
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:::*   the characters which are used for the   '''on'''   and   '''off'''   (bits)   [defaults are   '''1'''   and   '''0''']
:::*   the characters which are used for the   '''on'''   and   '''off'''   (bits)   [defaults are   '''1'''   and   '''0''']
<br>Programming note: &nbsp; none of the command line parameters are checked for errors (so as to make the program simpler).
<br>Programming note: &nbsp; none of the command line parameters are checked for errors (so as to make the program simpler).
<lang rexx>/*REXX program presents a "flipping bit" puzzle, user can solve via C.L.*/
<lang rexx>/*REXX program presents a "flipping bit" puzzle. The user can solve via it via C.L. */
parse arg N u on off . /*get optional arguments. */
parse arg N u on off . /*get optional arguments from the C.L. */
if N=='' | N==',' then N=3 /*Size given? Then use default.*/
if N=='' | N=="," then N =3 /*Size given? Then use default of 3.*/
if u=='' | u==',' then u=N /*number of bits initialized ON.*/
if u=='' | u=="," then u =N /*the number of bits initialized to ON.*/
if on =='' then on =1 /*character used for "on". */
if on =='' then on =1 /*the character used for "on". */
if off=='' then off=0 /*character used for "off". */
if off=='' then off=0 /* " " " " "off". */
col@='a b c d e f g h i j k l m n o p q r s t u v w x y z' /*for col id.*/
col@= 'a b c d e f g h i j k l m n o p q r s t u v w x y z' /*for the column id.*/
cols=space(col@,0); upper cols /*letters to be used for columns.*/
cols=space(col@,0); upper cols /*letters to be used for the columns. */
@.=off; !.=off /*set both arrays to "off" chars.*/
@.=off; !.=off /*set both arrays to "off" characters.*/
tries=0 /*# of player's attempts used. */
tries=0 /*number of player's attempts (so far).*/
do while show(0) < u /* [↓] turn "on" U bits.*/
do while show(0) < u /* [↓] turn "on" U number of bits.*/
r=random(1,N); c=random(1,N) /*get a random row and column.*/
r=random(1,N); c=random(1,N) /*get a random row and column. */
@.r.c=on ; !.r.c=on /*set (both) row & column to ON*/
@.r.c=on ; !.r.c=on /*set (both) row and column to ON. */
end /*while*/ /* [↑] keep going 'til U bits set*/
end /*while*/ /* [↑] keep going 'til U bits set.*/
oz=z /*keep the original array string.*/
oz=z /*keep the original array string. */
call show 1, ' ◄───target' /*show target for user to attain.*/
call show 1, ' ◄───target' /*show target for user to attain. */


do random(1,2); call flip 'R',random(1,N) /*flip a row of bits*/
do random(1,2); call flip 'R',random(1,N) /*flip a row of bits. */
call flip 'C',random(1,N) /* " " col " " */
call flip 'C',random(1,N) /* " " column " " */
end /*random···*/ /* [↑] 1 or 2 times*/
end /*random···*/ /* [↑] just perform 1 or 2 times. */


if z==oz then call flip 'R',random(1,N) /*ensure it's not the target.*/
if z==oz then call flip 'R',random(1,N) /*ensure it's not target we're flipping*/


do until z==oz /*prompt until they get it right.*/
do until z==oz /*prompt until they get it right. */
call prompt /*get a row or column # from C.L.*/
call prompt /*get a row or column number from C.L. */
call flip left(?,1),substr(?,2) /*flip a user selected row or col*/
call flip left(?,1),substr(?,2) /*flip a user selected row or column. */
call show 0 /*get image (Z) of updated array.*/
call show 0 /*get image (Z) of the updated array. */
end /*until···*/
end /*until···*/


call show 1, ' ◄───your array' /*display the array to the screen*/
call show 1, ' ◄───your array' /*display the array to the terminal. */
say '─────────Congrats! You did it in' tries "tries."
say '─────────Congrats! You did it in' tries "tries."
exit tries /*stick a fork in it, we're done.*/
exit tries /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
/*──────────────────────────────────FLIP subroutine────────────────────────*/
flip: parse arg x,# /*X is R or C, # is which one.*/
halt: say 'program was halted!'; exit /*the REXX program was halted by user. */
⚫
isInt: return datatype(arg(1),'W') /*returns 1 if arg is an integer.*/
⚫
do c=1 for N while x=='R'; if @.#.c==on then @.#.c=off; else @.#.c=on; end
⚫
isLet: return datatype(arg(1),'M') /*returns 1 if arg is a letter. */
do r=1 for N while x=='C'; if @.r.#==on then @.r.#=off; else @.r.#=on; end
return /* [↑] the bits can be ON or OFF*/
terr: if ok then say '***error!***: illegal' arg(1); ok=0; return
/*──────────────────────────────────────────────────────────────────────────────────────*/
/*──────────────────────────────────PROMPTER subroutine─────────────────*/
⚫
flip: parse arg x,# /*X is R or C; #: is which one.*/
⚫
prompt: if tries\==0 then say '─────────bit array after play: ' tries
signal on halt /*another way for player to quit.*/
do c=1 for N while x=='R'; if @.#.c==on then @.#.c=off; else @.#.c=on; end
⚫
do r=1 for N while x=='C'; if @.r.#==on then @.r.#=off; else @.r.#=on; end
⚫
!='─────────Please enter a row number or column letter, or Quit:'
call show 1, ' ◄───your array' /*display the array to the screen*/
return /* [↑] the bits can be ON or OFF. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
⚫
prompt: if tries\==0 then say '─────────bit array after play: ' tries
signal on halt /*another method for the player to quit*/
⚫
!='─────────Please enter a row number or column letter, or Quit:'
call show 1, ' ◄───your array' /*display the array to the terminal. */


do forever; ok=1; say; say !; pull ? _ . 1 all /*prompt & get ans*/
do forever; ok=1; say; say !; pull ? _ . 1 all /*prompt & get ans*/
if abbrev('QUIT',?,1) then do; say 'quitting···'; exit 0; end
if abbrev('QUIT',?,1) then do; say 'quitting···'; exit 0; end
if ?=='' then do; call show 1,' ◄───target',.; ok=0
if ?=='' then do; call show 1," ◄───target",.; ok=0
call show 1,' ◄───your array'
call show 1," ◄───your array"
end /* [↑] reshow targ*/
end /* [↑] reshow targ*/
if _\=='' then call terr 'too many args entered:' all
if _\=='' then call terr 'too many args entered:' all
if \isInt(?) & \isLet(?) then call terr 'row/column: ' ?
if \isInt(?) & \isLet(?) then call terr 'row/column: ' ?
if isLet(?) then a=pos(?,cols)
if isLet(?) then a=pos(?,cols)
if isLet(?) & (a<1 | a>N) then call terr 'column: ' ?
if isLet(?) & (a<1 | a>N) then call terr 'column: ' ?
if isLet(?) & length(?)>1 then call terr 'column: ' ?
if isLet(?) & length(?)>1 then call terr 'column: ' ?
if isLet(?) then ?='C'pos(?,cols)
if isLet(?) then ?='C'pos(?,cols)
if isInt(?) & (?<1 | ?>N) then call terr 'row: ' ?
if isInt(?) & (?<1 | ?>N) then call terr 'row: ' ?
if isInt(?) then ?=?/1 /*normalize number*/
if isInt(?) then ?=?/1 /*normalize number*/
if isInt(?) then ?='R'?
if isInt(?) then ?='R'?
if ok then leave /*No errors? Leave*/
if ok then leave /*No errors? Leave*/
end /*forever*/ /*endeth da checks*/
end /*forever*/ /*end of da checks*/


tries=tries+1 /*bump da counter.*/
tries=tries+1 /*bump da counter.*/
return ? /*return response.*/
return ? /*return response.*/
/*──────────────────────────────────────────────────────────────────────────────────────*/
/*──────────────────────────────────SHOW subroutine─────────────────────*/
show: $=0; _=; z=; parse arg tell,tx,o /*$: # of ON bits.*/
show: $=0; _=; z=; parse arg tell,tx,o /*$: # of ON bits.*/
if tell then do /*are we telling? */
if tell then do; say /*are we telling? */
say /*show blank line.*/
say ' ' subword(col@,1,N) " column letter"
say ' ' subword(col@,1,N) " column letter"
say 'row ╔'copies('═',N+N+1) /*prepend col hdrs*/
say 'row ╔'copies('═',N+N+1) /*prepend col hdrs*/
end /* [↑] grid hdrs.*/
⚫
end /* [↑] grid hdrs.*/


do r=1 for N /*show grid rows.*/
do r=1 for N /*show grid rows.*/
do c=1 for N /*build grid cols.*/
do c=1 for N /*build grid cols.*/
if o==. then do; z=z || !.r.c; _=_ !.r.c; $=$+(!.r.c==on); end
if o==. then do; z=z || !.r.c; _=_ !.r.c; $=$+(!.r.c==on); end
else do; z=z || @.r.c; _=_ @.r.c; $=$+(@.r.c==on); end
else do; z=z || @.r.c; _=_ @.r.c; $=$+(@.r.c==on); end
end /*c*/ /*··· and sum ONs.*/
end /*c*/ /*··· and sum ONs.*/
if tx\=='' then tar.r=_ tx /*build da target?*/
if tx\=='' then tar.r=_ tx /*build da target?*/
if tell then say right(r,2) ' ║'_ tx; _= /*show the grid? */
if tell then say right(r,2) ' ║'_ tx; _= /*show the grid? */
end /*r*/ /*show a grid row.*/
end /*r*/ /*show a grid row.*/


if tell then say /*show blank line.*/
if tell then say /*show blank line.*/
return $ /*$: # of ON bits.*/
return $ /*$: # of ON bits.*/</lang>
⚫
'''output''' &nbsp; when using the default input of: &nbsp; <tt> 3 </tt>
/*──────────────────────────────────one-liner subroutines───────────────*/
halt: say 'program was halted!'; exit /*the REXX program was halted.*/
⚫
isInt: return datatype(arg(1),'W') /*returns 1 if arg is an int. */
⚫
isLet: return datatype(arg(1),'M') /*returns 1 if arg is a letter*/
terr: if ok then say '***error!***: illegal' arg(1); ok=0; return</lang>
⚫
'''output''' when using the default input of: &nbsp; <tt> 3 </tt>


<br>Note that the user's input is also shown.
<br>Note that the user's input is also shown.

<br>Also note that the 2<sup>nd</sup> answer was a blank (or nothing), which caused the program to re-show the target array.
Also note that the 2<sup>nd</sup> answer was a blank (or nothing), which caused the program to re-show the target array.
<pre style="height:75ex">
<pre style="height:75ex">
a b c column letter
a b c column letter
Line 2,546: Line 2,546:
─────────Congrats! You did it in 3 tries.
─────────Congrats! You did it in 3 tries.
</pre>
</pre>
'''output''' when the following was used for input: 4 , + -
'''output''' &nbsp; when the following was used for input: &nbsp; <tt> 4 &nbsp; , &nbsp; + &nbsp; - </tt>
<pre>
<pre>
a b c d column letter
a b c d column letter
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