Execute HQ9+
You are encouraged to solve this task according to the task description, using any language you may know.
Implement a HQ9+ interpreter or compiler for Rosetta Code.
Ada
see Execute HQ9+/Ada
AutoHotkey
<lang AutoHotkey>; http://www.autohotkey.com/forum/viewtopic.php?p=356268#356268
testCode := "hq9+HqQ+Qq"
MsgBox % RunHQ9Plus(testCode)
- ---------------------------------
RunHQ9Plus(input) {
Loop, Parse, input
If ( A_LoopField = "+" )
acc++
Else If ( A_LoopField = "H" )
output .= "Hello, world!`n"
Else If ( A_LoopField = "Q" )
output .= input "`n"
Else If ( A_LoopField = "9" )
Loop, 99
{
; following 4 lines could be only 1 long line
output .= (99+1-A_Index) " bottles of beer on the wall`n"
output .= (99+1-A_Index) " bottles of beer`n"
output .= "Take one down, pass it around`n"
output .= (99-A_Index) " bottles of beer on the wall`n`n"
}
Return output
}</lang>
C
<lang c>void runCode(char *code) {
int c_len = strlen(code);
int i, accumulator, bottles;
for(i=0;i<c_len;i++)
{
switch(code[i])
{
case 'Q':
printf("%s\n", code);
break;
case 'H':
printf("Hello, world!\n");
break;
case '9':
//Nice bottles song alg. from RC :)
bottles = 99;
do {
printf("%d bottles of beer on the wall\n", bottles);
printf("%d bottles of beer\n", bottles);
printf("Take one down, pass it around\n");
printf("%d bottles of beer on the wall\n\n", --bottles);
} while( bottles > 0 );
break;
case '+':
//Am I the only one finding this one weird? :o
accumulator++;
break;
}
}
};</lang>
C++
Basically the same as the C example, although this has been C++'ified with strings and streams. <lang cpp>void runCode(string code) {
int c_len = code.length();
int accumulator, bottles;
for(int i=0;i<c_len;i++)
{
switch(code[i])
{
case 'Q':
cout << code << endl;
break;
case 'H':
cout << "Hello, world!" << endl;
break;
case '9':
//Nice bottles song alg. from RC :)
bottles = 99;
do {
cout << bottles << " bottles of beer on the wall" << endl;
cout << bottles << " bottles of beer" << endl;
cout << "Take one down, pass it around" << endl;
cout << --bottles << " bottles of beer on the wall" << endl << endl;
} while( bottles > 0 );
break;
case '+':
//Am I the only one finding this one weird? :o
accumulator++;
break;
}
}
};</lang>
C#
<lang csharp> using System; using System.Collections.Generic; using System.Linq;
class Program {
static void RunCode(string code)
{
int accumulator = 0;
var opcodes = new Dictionary<char, Action>
{
{'H', () => Console.WriteLine("Hello, World!"))},
{'Q', () => Console.WriteLine(code) },
{'9', () => Console.WriteLine(Enumerable.Range(1,100).Reverse().Select(n => string.Format("{0} bottles of beer on the wall\n{0} bottles of beer\nTake one down, pass it around\n{1} bottles of beer on the wall\n", n, n-1)).Aggregate((a,b) => a + "\n" + b))},
{'+', () => accumulator++ }
}
foreach(var c in code)
opcodes[c]();
}
} </lang>
Common Lisp
See RCHQ9+/Common Lisp.
E
See RCHQ9+/E.
Forth
<lang forth>variable accumulator
- H cr ." Hello, world!" ;
- Q cr 2dup type ;
- 9 99 verses ; \ http://rosettacode.org/wiki/99_Bottles_of_Beer#Forth
- + 1 accumulator +! ;
- hq9+ ( "code" -- )
parse-word 2dup bounds ?do i 1 [ get-current literal ] search-wordlist if execute else true abort" invalid HQ9+ instruction" then loop 2drop ;</lang>
Haskell
See RCHQ9+/Haskell.
Inform 7
<lang inform7>HQ9+ is a room.
After reading a command: interpret the player's command; reject the player's command.
To interpret (code - indexed text): let accumulator be 0; repeat with N running from 1 to the number of characters in code: let C be character number N in code in upper case; if C is "H": say "Hello, world!"; otherwise if C is "Q": say "[code][line break]"; otherwise if C is "9": repeat with iteration running from 1 to 99: let N be 100 - iteration; say "[N] bottle[s] of beer on the wall[line break]"; say "[N] bottle[s] of beer[line break]"; say "Take one down, pass it around[line break]"; say "[N - 1] bottle[s] of beer on the wall[paragraph break]"; otherwise if C is "+": increase accumulator by 1.</lang>
J
From 99 Bottles of Beer <lang J>bob =: ": , ' bottle' , (1 = ]) }. 's of beer'"_ bobw=: bob , ' on the wall'"_ beer=: bobw , ', ' , bob , '; take one down and pass it around, ' , bobw@<:</lang>
The rest of the interpreter: <lang J>H=: smoutput bind 'Hello, world!' Q=: smoutput @ [ hq9=: smoutput @: (beer"0) bind (1+i.-99) hqp=: (A=:1)1 :'0 0$A=:A+m[y'@]
hq9p=: H`H`Q`Q`hq9`hqp@.('HhQq9+' i. ])"_ 0~</lang>
Example use:
<lang J> hq9p 'hqQQq' Hello, world! hqQQq hqQQq hqQQq hqQQq</lang>
Java
See RCHQ9+/Java.
JavaScript
The function below executes a HQ9+ program and returns the program output as a string. <lang javascript>function hq9plus(code) {
var out = ;
var acc = 0;
for (var i=0; i<code.length; i++) {
switch (code.charAt(i)) {
case 'H': out += "hello, world\n"; break;
case 'Q': out += code + "\n"; break;
case '9':
for (var j=99; j>1; j--) {
out += j + " bottles of beer on the wall, " + j + " bottles of beer.\n";
out += "Take one down and pass it around, " + (j-1) + " bottles of beer.\n\n";
}
out += "1 bottle of beer on the wall, 1 bottle of beer.\n" +
"Take one down and pass it around, no more bottles of beer on the wall.\n\n" +
"No more bottles of beer on the wall, no more bottles of beer.\n" +
"Go to the store and buy some more, 99 bottles of beer on the wall.\n";
break;
case '+': acc++; break;
}
}
return out;
}</lang>
Liberty BASIC
<lang lb>'Try this hq9+ program - "hq9+HqQ+Qq" Prompt "Please input your hq9+ program."; code$ Print hq9plus$(code$) End
Function hq9plus$(code$)
For i = 1 to Len(code$)
Select Case
Case Upper$(Mid$(code$, i, 1)) = "H"
hq9plus$ = hq9plus$ + "Hello, world!"
Case Upper$(Mid$(code$, i, 1)) = "Q"
hq9plus$ = hq9plus$ + code$
Case Mid$(code$, i, 1) = "9"
For bottles = 99 To 1 Step -1
hq9plus$ = hq9plus$ + str$(bottles) + " bottle"
If (bottles > 1) Then hq9plus$ = hq9plus$ + "s"
hq9plus$ = hq9plus$ + " of beer on the wall, " + str$(bottles) + " bottle"
If (bottles > 1) Then hq9plus$ = hq9plus$ + "s"
hq9plus$ = hq9plus$ + " of beer," + chr$(13) + chr$(10) + "Take one down, pass it around, " + str$(bottles - 1) + " bottle"
If (bottles > 2) Or (bottles = 1) Then hq9plus$ = hq9plus$ + "s"
hq9plus$ = hq9plus$ + " of beer on the wall." + chr$(13) + chr$(10)
Next bottles
hq9plus$ = hq9plus$ + "No more bottles of beer on the wall, no more bottles of beer." _
+ chr$(13) + chr$(10) + "Go to the store and buy some more, 99 bottles of beer on the wall."
Case Mid$(code$, i, 1) = "+"
accumulator = (accumulator + 1)
End Select
If Mid$(code$, i, 1) <> "+" Then
hq9plus$ = hq9plus$ + chr$(13) + chr$(10)
End If
Next i
hq9plus$ = Left$(hq9plus$, (Len(hq9plus$) - 2))
End Function</lang>
Perl 6
99 bottles code adapted from here. [1]
<lang perl6>class HQ9Interpreter {
has @!code;
has $!pointer;
has $!accumulator;
method new (Str $code) {
HQ9Interpreter.bless(*,code => $code.comb);
}
method run {
$!accumulator = 0;
$!pointer = 0;
while $!pointer < @!code {
given @!code[$!pointer].lc {
when 'h' { say "Hello world!" }
when 'q' { say @!code }
when '9' {
my $b = 99;
sub r { "$b bottle{$b-1??"s"!!""} of beer" };
my $w = "on the wall";
while $b {
.say for "&r() $w,","&r()!";
--$b;
.say for "Take one down, pass it around,","&r() $w!",;
}
}
when '+' { $!accumulator++ }
default { say "Syntax error: Unknown command \"{@!code[$!pointer]}\"" and exit }
}
$!pointer++;
} }
}
my $code = "hHq+++QqJ"; my $hq9 = HQ9Interpreter.new($code); $hq9.run;</lang>
Output:
Hello world! Hello world! hHq+++QqJ hHq+++QqJ hHq+++QqJ Syntax error: Unknown command "J"
PicoLisp
<lang PicoLisp>(de hq9+ (Code)
(let Accu 0
(for C (chop Code)
(case C
("H" (prinl "Hello, world"))
("Q" (prinl Code))
("9"
(for (N 99 (gt0 N))
(prinl N " bottles of beer on the wall")
(prinl N " bottles of beer")
(prinl "Take one down, pass it around")
(prinl (dec 'N) " bottles of beer on the wall")
(prinl) ) )
("+" (inc 'Accu)) ) )
Accu ) )</lang>
PureBasic
<lang PureBasic>Procedure hq9plus(code.s)
Protected accumulator, i, bottles
For i = 1 To Len(code)
Select Mid(code, i, 1)
Case "h", "H"
PrintN("Hello, world!")
Case "q", "Q"
PrintN(code)
Case "9"
bottles = 99
While bottles
PrintN(Str(bottles) + " bottles of beer on the wall, " + Str(bottles) + " bottles of beer,")
bottles - 1
PrintN("Take one down, pass it around, " + Str(bottles) + " bottles of beer on the wall.")
Wend
Case "+"
accumulator + 1
EndSelect
Next i
EndProcedure
If OpenConsole()
Define testCode.s = "hq9+HqQ+Qq" hq9plus(testCode) Print(#CRLF$ + #CRLF$ + "Press ENTER to exit"): Input() CloseConsole()
EndIf</lang>
Python
See RCHQ9+/Python.
Ruby
See RCHQ9+/Ruby.
Scala
<lang Scala>def hq9plus(code: String) : String = {
var out = "" var acc = 0
def bottle(num: Int) : Unit = {
if (num > 1) {
out += num + " bottles of beer on the wall, " + num + " bottles of beer.\n"
out += "Take one down and pass it around, " + (num - 1) + " bottle"
if (num > 2) out += "s"
out += " of beer.\n\n"
bottle(num - 1)
}
else {
out += "1 bottle of beer on the wall, 1 bottle of beer.\n" +
"Take one down and pass it around, no more bottles of beer on the wall.\n\n" +
"No more bottles of beer on the wall, no more bottles of beer.\n" +
"Go to the store and buy some more, 99 bottles of beer on the wall.\n"
}
}
def handle(char: Char) = char match {
case 'H' => out += "Hello world!\n"
case 'Q' => out += code + "\n"
case '+' => acc += 1
case '9' => bottle(99)
}
code.toList foreach handle out
}
println(hq9plus("HQ9+")) </lang>
Tcl
See RCHQ9+/Tcl.
Ursala
See RCHQ9+/Ursala.