Magic 8-Ball

From Rosetta Code
Magic 8-Ball is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.


Create Magic 8-Ball. See details: Magic 8-Ball


AWK[edit]

 
# syntax: GAWK -f MAGIC_8-BALL.AWK
BEGIN {
# Ten answers are affirmative, five are non-committal, and five are negative.
arr[++i] = "It is certain"
arr[++i] = "It is decidedly so"
arr[++i] = "Without a doubt"
arr[++i] = "Yes, definitely"
arr[++i] = "You may rely on it"
arr[++i] = "As I see it, yes"
arr[++i] = "Most likely"
arr[++i] = "Outlook good"
arr[++i] = "Signs point to yes"
arr[++i] = "Yes"
arr[++i] = "Reply hazy, try again"
arr[++i] = "Ask again later"
arr[++i] = "Better not tell you now"
arr[++i] = "Cannot predict now"
arr[++i] = "Concentrate and ask again"
arr[++i] = "Don't bet on it"
arr[++i] = "My reply is no"
arr[++i] = "My sources say no"
arr[++i] = "Outlook not so good"
arr[++i] = "Very doubtful"
srand()
printf("Please enter your question or a blank line to quit.\n")
while (1) {
printf("\n? ")
getline ans
if (ans ~ /^ *$/) {
break
}
printf("%s\n",arr[int(rand()*i)+1])
}
exit(0)
}
 
Output:
Please enter your question or a blank line to quit.

? will you still love me tomorrow
Yes, definitely

?

C[edit]

Translation of: Kotlin
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
int main() {
char *question = NULL;
size_t len = 0;
ssize_t read;
const char* answers[20] = {
"It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"
};
srand(time(NULL));
printf("Please enter your question or a blank line to quit.\n");
while (1) {
printf("\n? : ");
read = getline(&question, &len, stdin);
if (read < 2) break;
printf("\n%s\n", answers[rand() % 20]);
}
if (question) free(question);
return 0;
}
Output:

Sample session :

Please enter your question or a blank line to quit.

? : Will May win the next UK election?

It is certain

? : Do flying saucers really exist?

Signs point to yes

? : Will humans ever colonize Mars?

It is decidedly so

? : 

Clojure[edit]

 
(def responses
["It is certain" "It is decidedly so" "Without a doubt"
"Yes, definitely" "You may rely on it" "As I see it, yes"
"Most likely" "Outlook good" "Signs point to yes" "Yes"
"Reply hazy, try again" "Ask again later"
"Better not tell you now" "Cannot predict now"
"Concentrate and ask again" "Don't bet on it"
"My reply is no" "My sources say no" "Outlook not so good"
"Very doubtful"])
 
(do
(println "Ask a question. ")
(read-line)
(println (rand-nth responses)))
 

Factor[edit]

USING: io kernel random sequences ;
IN: rosetta-code.magic-8-ball
 
CONSTANT: phrases {
"It is certain" "It is decidedly so" "Without a doubt"
"Yes, definitely" "You may rely on it" "As I see it, yes"
"Most likely" "Outlook good" "Signs point to yes" "Yes"
"Reply hazy, try again" "Ask again later"
"Better not tell you now" "Cannot predict now"
"Concentrate and ask again" "Don't bet on it"
"My reply is no" "My sources say no" "Outlook not so good"
"Very doubtful"
}
 
"Please enter your question or a blank line to quit." print
 
[ "? : " write flush readln empty? [ f ]
[ phrases random print t ] if ] loop
Output:
Please enter your question or a blank line to quit.
? : Are there more than 10^57 grains of sand in the universe?
Yes
? : Are cats secretly alien spies?
Signs point to yes
? : Am I a genius?
Outlook not so good
? :

Go[edit]

Translation of: Kotlin
package main
 
import (
"bufio"
"bytes"
"fmt"
"log"
"math/rand"
"os"
"time"
)
 
func main() {
rand.Seed(time.Now().UnixNano())
answers := [...]string{
"It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful",
}
const prompt = "\n? : "
fmt.Print("Please enter your question or a blank line to quit.\n" + prompt)
sc := bufio.NewScanner(os.Stdin)
for sc.Scan() {
question := sc.Bytes()
question = bytes.TrimSpace(question)
if len(question) == 0 {
break
}
answer := answers[rand.Intn(len(answers))]
fmt.Printf("\n%s\n"+prompt, answer)
}
if err := sc.Err(); err != nil {
log.Fatal(err)
}
}
Output:
Please enter your question or a blank line to quit.

? : Will Trump win the next US election?

As I see it, yes

? : Is it true that we live in a multiverse?

Yes

? : Will the singularity occur before 2030?

My reply is no

? : 

JavaScript[edit]

 
//console
var answers = [ "It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"])
 
console.log("ASK ANY QUESTION TO THE MAGIC 8-BALL AND YOU SHALL RECEIVE AN ANSWER!")
 
for(;;){
var answer = prompt("question:")
console.log(answer)
console.log(answers[Math.floor(Math.random()*answers.length)]);
}
 
Output:
"ASK ANY QUESTION TO THE MAGIC 8-BALL AND YOU SHALL RECEIVE AN ANSWER!"

"Is this code going to work?"

"Most likely"

Kotlin[edit]

// Version 1.2.40
 
import java.util.Random
 
fun main(args: Array<String>) {
val answers = listOf(
"It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"
)
val rand = Random()
println("Please enter your question or a blank line to quit.")
while (true) {
print("\n? : ")
val question = readLine()!!
if (question.trim() == "") return
val answer = answers[rand.nextInt(20)]
println("\n$answer")
}
}
Output:

Sample session :

Please enter your question or a blank line to quit.

? : Will Trump win the next US election?

Outlook not so good

? : Is it true that we live in a multiverse?

It is certain

? : Will the singularity occur before 2030?

Reply hazy, try again

? : Will the singularity occur before 2030?

Signs point to yes

? : 

M2000 Interpreter[edit]

 
Module Magic.8.Ball {
answers=("It is certain", "It is decidedly so", "Without a doubt", "Yes, definitely", "You may rely on it", "As I see it, yes", "Most likely", "Outlook good", "Signs point to yes", "Yes", "Reply hazy, try again", "Ask again later", "Better not tell you now", "Cannot predict now", "Concentrate and ask again", "Don't bet on it", "My reply is no", "My sources say no", "Outlook not so good", "Very doubtful")
Print "Please enter your question or a blank line to quit."
{
Line Input A$
Print
A$=trim$(A$)
If A$="" Then Exit
Print Array$(answers, Random(0, 19))
Loop
}
}
Magic.8.Ball
 

ooRexx[edit]

 
/* REXX */
a=.array~of("It is certain", "It is decidedly so", "Without a doubt",,
"Yes, definitely", "You may rely on it", "As I see it, yes",,
"Most likely", "Outlook good", "Signs point to yes", "Yes",,
"Reply hazy, try again", "Ask again later",,
"Better not tell you now", "Cannot predict now",,
"Concentrate and ask again", "Don't bet on it",,
"My reply is no", "My sources say no", "Outlook not so good",,
"Very doubtful")
Do Forever
Say 'your question:'
Parse Pull q
If q='' Then Leave
Say a[random(1,20)]
Say ''
End
Output:
your question:
will it rain tonight
Concentrate and ask again

your question:
will it rain tonight
You may rely on it

your question:

Perl[edit]

@a = ('It is certain', 'It is decidedly so', 'Without a doubt', 'Yes, definitely',
'You may rely on it', 'As I see it, yes', 'Most likely', 'Outlook good',
'Signs point to yes', 'Yes', 'Reply hazy, try again', 'Ask again later',
'Better not tell you now', 'Cannot predict now', 'Concentrate and ask again',
"Don't bet on it", 'My reply is no', 'My sources say no', 'Outlook not so good',
'Very doubtful');
 
while () {
print 'Enter your question:';
last unless <> =~ /\w/;
print @a[int rand @a], "\n";
}

Perl 6[edit]

Works with: Rakudo version 2018.03
put 'Please enter your question or a blank line to quit.';
 
["It is certain", "It is decidedly so", "Without a doubt", "Yes, definitely",
"You may rely on it", "As I see it, yes", "Most likely", "Outlook good",
"Signs point to yes", "Yes", "Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now", "Concentrate and ask again",
"Don't bet on it", "My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"].roll.put while prompt('? : ').chars;

Output very similar to C, Kotlin and zkl examples.


PHP[edit]

CLI[edit]

<?php
 
$fortunes = array(
"It is certain",
"It is decidedly so",
"Without a doubt",
"Yes, definitely",
"You may rely on it",
"As I see it, yes",
"Most likely",
"Outlook good",
"Signs point to yes",
"Yes",
"Reply hazy, try again",
"Ask again later",
"Better not tell you now",
"Cannot predict now",
"Concentrate and ask again",
"Don't bet on it",
"My reply is no",
"My sources say no",
"Outlook not so good",
"Very doubtful"
);
 
/*
* Prompt the user at the CLI for the command
*/

function cli_prompt( $prompt='> ', $default=false ) {
 
// keep asking until a non-empty response is given
do {
// display the prompt
echo $prompt;
 
// read input and remove CRLF
$cmd = chop( fgets( STDIN ) );
 
} while ( empty( $default ) and empty( $cmd ) );
 
return $cmd ?: $default;
 
}
 
$question = cli_prompt( 'What is your question? ' );
 
echo 'Q: ', $question, PHP_EOL;
 
echo 'A: ', $fortunes[ array_rand( $fortunes ) ], PHP_EOL;
 
Output:
$ php 8ball.php
What is your question? Are we together forever and never to part?
Q: Are we together forever and never to part?
A: Without a doubt

$ php 8ball.php
What is your question? Are we together forever we two?
Q: Are we together forever we two?
A: Don't bet on it

$ php 8ball.php
What is your question? Will I move heaven and earth to be together forever with you?
Q: Will I move heaven and earth to be together forever with you?
A: It is certain

Python[edit]

import random
 
s = ('It is certain', 'It is decidedly so', 'Without a doubt', 'Yes, definitely',
'You may rely on it', 'As I see it, yes', 'Most likely', 'Outlook good',
'Signs point to yes', 'Yes', 'Reply hazy, try again', 'Ask again later',
'Better not tell you now', 'Cannot predict now', 'Concentrate and ask again',
"Don't bet on it", 'My reply is no', 'My sources say no', 'Outlook not so good',
'Very doubtful')
 
q_and_a = {}
 
while True:
question = input('Ask your question:')
if len(question) == 0: break
 
answer = random.choice(s)
 
if question in q_and_a:
print('Your question has already been answered')
else:
q_and_a[question] = answer
print(answer)
Output:
Ask your question:Is python the best language ever?
Better not tell you now
Ask your question:You are really not helping your case here.
Very doubtful
Ask your question:So, no?
Signs point to yes
Ask your question:So, no?
Your question has already been answered
Ask your question:

Racket[edit]

(define eight-ball-responses
(list "It is certain" "It is decidedly so" "Without a doubt" "Yes definitely" "You may rely on it"
"As I see it, yes" "Most likely" "Outlook good" "Yes" "Signs point to yes"
"Reply hazy try again" "Ask again later" "Better not tell you now" "Cannot predict now"
"Concentrate and ask again"
"Don't count on it" "My reply is no" "My sources say no" "Outlook not so good"
"Very doubtful"))
 
(define ((answer-picker answers)) (sequence-ref answers (random (sequence-length answers))))
 
(define magic-eightball (answer-picker eight-ball-responses))
 
(module+ main
(let loop ()
(display "What do you want to know\n?")
(read-line)
(displayln (magic-eightball))
(loop)))
Output:

We'll see if it's right.

REXX[edit]

version 1[edit]

 
/* REXX */
Call mk_a "It is certain", "It is decidedly so", "Without a doubt",,
"Yes, definitely", "You may rely on it", "As I see it, yes",,
"Most likely", "Outlook good", "Signs point to yes", "Yes",,
"Reply hazy, try again", "Ask again later",,
"Better not tell you now", "Cannot predict now",,
"Concentrate and ask again", "Don't bet on it",,
"My reply is no", "My sources say no", "Outlook not so good",,
"Very doubtful"
Do Forever
Say 'your question:'
Parse Pull q
If q='' Then Leave
z=random(1,a.0)
Say a.z
Say ''
End
Exit
mk_a:
a.0=arg()
Do i=1 To a.0
a.i=arg(i)
End
Return
 
Output:
your question:
will it rain tonight
My reply is no

your question:
will it rain tonight
Signs point to yes

your question:

version 2[edit]

This REXX version is modeled after the   Ring   entry.

The method used is to translate all blanks to psuedo-blanks, then extract and show a random phrase   (after translating the pseudo-blanks back to blanks).

Also, this REXX version appends a period to the phrase as per the (linked) documentation.

/*REXX program simulates the  "shaking"  of a  "Magic 8-ball"  and displaying an answer.*/
$= "It is certain ÷It is decidedly so ÷Without a doubt ÷Yes, definitely",
"÷You may rely on it ÷As I see it, yes ÷Most likely ÷Outlook good ÷Signs point to yes",
"÷Yes ÷Reply hazy, try again ÷Ask again later ÷Better not tell you now",
"÷Cannot predict now ÷Concentrate and ask again ÷Don't bet on it ÷My reply is no",
"÷My sources say no ÷Outlook not so good ÷Very doubtful"
@=translate(translate($, '┼', " "),, '÷') /*trans: blanks─►psuedos, seps─►blanks.*/
say space(translate(word(@,random(1,20)),,"┼")). /*stick a fork in it, we're all done. */
output   when invoking the REXX program:
Reply hazy, try again.

Ring[edit]

 
# Project : Magic 8-Ball
 
answers = ["It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"]
index = random(len(answers)-1)+1
see answers[index] + nl
 

Output:

It is certain

zkl[edit]

Translation of: Perl 6
answers:=T(
"It is certain", "It is decidedly so", "Without a doubt",
"Yes, definitely", "You may rely on it", "As I see it, yes",
"Most likely", "Outlook good", "Signs point to yes", "Yes",
"Reply hazy, try again", "Ask again later",
"Better not tell you now", "Cannot predict now",
"Concentrate and ask again", "Don't bet on it",
"My reply is no", "My sources say no", "Outlook not so good",
"Very doubtful"
);
println("Please enter your question or a blank line to quit.");
while(ask("? : ")){ println(answers[(0).random(answers.len())]) }
Output:
lease enter your question or a blank line to quit.
? : will it rain today 
It is certain
? : where is Turkey
Yes
? : what is the price of milk
It is decidedly so
? : who is Elton John
Most likely
? :