How to keep program from closing? - ruby

I'm using a Ruby interpreter to run the code I created(a simple guess a number 1-100 code), but every time you guess the number correctly or incorrectly after x number of times it automatically closes itself after it prints out "You Win!" or "You Lose!". Here's the code:
srand
random_number = rand 1..100
guesses = 10
while guesses > 0
puts "I'm thinking of a number between 1 and 100."
print "What number am I thinking of?"
guess = gets.chomp.to_i
guesses -= 1
break if guess == random_number
puts "Too high" if guess > random_number
puts "Too low" if guess < random_number
end
if guess == random_number
puts "You win!"
else
puts "You lose, sorry!"
end
How can I keep it from shutting itself down, so the user can see the displayed message?

Why not end with:
puts "Hit enter to exit."
gets

Related

How to get my number of attempts correct?

Hello all I previously asked how to fix a guessing number game on ruby which I got all done but now the number of attempts or tries is not reflecting nicely. Do I resolve this?
This is the code:
def check(int, r_int)
tries = 0
if int < r_int
tries +=1
puts "Guess Higher"
elsif int > r_int
tries +=1
puts "Guess Lower"
elsif int == r_int
win = true
puts "You are correct"
puts "You had attempted this "+ tries.to_s + " times to win"
abort
end
end
This is the main function:
def main
win = false
puts "Lets play a game!"
puts "I am thinking of a number between 1 and 100"
rnd_int = rand(100)
while not win
guess = gets.chomp.to_i
value = check(guess, rnd_int)
end
end
Overall everything works but the tries at the end of the game remains at 0 not sure where the mistake is.
Perhaps the code could look like following (just a suggestion)
def check(attempts,guess,number)
puts ">>> Attempts [#{attempts}]: guess higher" if guess < number
puts ">>> Attempts [#{attempts}]: guess lower" if guess > number
if guess == number
puts "Winner!!!"
return true
end
return false
end
if __FILE__ == $0
win = false
attempts = 5
puts "
Lets play a game!
I am thinking of a number between 1 and 100
"
number = rand(100)
while not win
print "Your guess: "
guess = gets.chomp.to_i
attempts -= 1
unless attempts
puts "You could not guess right"
exit
end
win = check(attempts, guess, number)
end
end
Output sample
Lets play a game!
I am thinking of a number between 1 and 100
Your guess: 50
>>> Attempts [4]: guess higher
Your guess: 80
>>> Attempts [3]: guess higher
Your guess: 90
>>> Attempts [2]: guess lower
Your guess: 86
Winner!!!
The code could be of following shape
win = false
attempts = 5
puts "
Lets play a game!
I am thinking of a number between 1 and 100
"
number = rand(100)
while not win
print "Your guess: "
guess = gets.chomp.to_i
attempts -= 1
score = guess <=> number
win = true if score == 0
puts "Attempts [#{attempts}]: guess higher" if score < 0
puts "Attempts [#{attempts}]: guess lower" if score > 0
unless attempts > 0
puts "You could not guess it right"
exit
end
end
puts "You are winner!!!"
Utilizing <=> operator the code would be shaped as following
attempts = 5
puts "
Lets play a game!
I am thinking of a number between 1 and 100
"
number = rand(100)
while true
print "Your guess: "
guess = gets.chomp.to_i
attempts -= 1
case guess <=> number
when 0
puts "\n>>> Nice guess, you are winner!!!"
exit
when -1
puts "Attempts [#{attempts}]: guess higher" if attempts > 0
when 1
puts "Attempts [#{attempts}]: guess lower" if attempts > 0
end
unless attempts > 0
puts "\n>>> Sorry, you could not guess it right"
exit
end
end

Handling Ruby Case Statement

I tried to rewrite the "if/else statement" in the following piece of code by replacing it with a "case" statement, and I am deadly stuck with it for a few hours - what am I missing?
puts "Welcome to 'Guess My Number!'"
print "What is your name?"
input = gets
name = input.chomp
puts "Welcome, #{name.upcase!}!"
puts "I've got a random number between 1 and 100!"
puts "Can you guess it?"
target = rand(100) + 1
num_guesses = 0
guessed_it = false
until num_guesses == 10 || guessed_it
remaining_guesses = 10 - num_guesses
puts "You've got #{remaining_guesses.to_s} guesses left!"
print "Make a guess, put down a number: "
guess = gets.chomp.to_i
num_guesses = num_guesses + 1
end
puts case verification
when guess < target
then "Ooops. Your guess was LOW."
when guess > target
then "Ooops. Your guess was HIGH."
when guess < -1
then puts "Oooops. You have entered a number lower that 1!"
when guess > 100
then puts "Oooops. You have entered a number higher than 100!"
when guess =~ /^([w])/
then puts "Ooops. Looks like you have entered a non numeric
value!"
when guess == String
then puts "Oooops! Looks like you have entered a non numeric
value"
when guess == target
then puts "Good job, #{name}!"
puts "You guessed my number in #{num_guesses} guesses!"
guessed_it = true
end
unless guessed_it
puts "Sorry, you didn't get my number. My number was #{target}."
end
The "case statement" was used to replace and enhance the logic of the following if else statement:
if guess < target
puts "Ooops. Your guess was LOW."
elsif guess > target
puts "Ooops. Your guess was HIGH."
elsif guess == target
puts "Good job, #{name}!"
puts "You guessed my number in #{num_guesses} guesses!"
guessed_it = true
end
Your problem is that you're using the form of case with the optional condition, but you're using when clauses as if you were using the condition-less case.
puts case
when guess < target
"Ooops. Your guess was LOW."
should work.
Further explanation:
using case without a condition, the earliest when branch with a truthy expression is executed. This is what you want here.
But you were using case with verification. In this case, all branches are compared to verification, and the first branch where verification === branch condition is true is executed.
Since in your example I'm guessing verification is always nil, and all your branches' conditions are always true or false, no branch will ever get executed.
You can use a case statement like so:
class String
def green;"\e[32m#{self}\e[0m";end
def yellow;"\e[33m#{self}\e[0m";end
def cyan;"\e[36m#{self}\e[0m";end
def bg_blue;"\e[44m#{self}\e[0m";end
def bold;"\e[1m#{self}\e[22m";end
def underline;"\e[4m#{self}\e[24m";end
def border(num);"\n#{'-' * num}\n#{self}\n#{'-' * num}\n";end
end
puts;puts "Welcome to 'Guess My Number!'".bold.bg_blue;puts
print 'What is your name? '.green
name = gets.chomp
puts "\nWelcome, #{name.upcase!}!\n".cyan.underline
puts "I've got a random number between 1 and 100!\nCan you guess it?".border(44)
target = rand(100) + 1
num_guesses = 0
guessed_it = false
until num_guesses == 10 || guessed_it
remaining_guesses = 10 - num_guesses
puts "\nYou've got #{remaining_guesses} guesses left!\n"
puts;print 'Make a guess, put down a number: '
guess = gets.chomp
case guess.to_i
when (1...target)
puts 'Ooops. Your guess was LOW'.yellow.border(26)
when (target + 1..100)
puts 'Ooops. Your guess was HIGH'.yellow.border(26)
when target
puts; puts; puts
puts "Good job, #{name}!".bold.green
puts 'You guessed my number in ' + "#{num_guesses} guesses!".cyan
puts; puts; puts
guessed_it = true
else
puts "Oooops. You didn't enter a number from 1 to 100".yellow.border(47); puts
end
num_guesses += 1
end
unless guessed_it
puts;puts;puts "Sorry, you didn't get my number. My number was #{target}.".yellow;puts
end
Thanks a lot to everybody! With your invaluable help I managed to regain patience in my soul and satisfaction from this small task :) My mistake is that I violated the rules of common sense by trying to run several pieces of code in a wrong sequence. I moved the case statement inside the until loop and now all I have to do is correct the mistakes in particular when/then statements. It works :)
until num_guesses == 10 || guessed_it
remaining_guesses = 10 - num_guesses
puts "You've got #{remaining_guesses.to_s} guesses left!"
print "Make a guess, put down a number: "
guess = gets.chomp.to_i
num_guesses = num_guesses + 1
puts case
when guess < target
then "Ooops. Your guess was LOW."
when guess > target
then "Ooops. Your guess was HIGH."
when guess < -1
then puts "Oooops. You have entered a number lower that 1!"
when guess > 100
then puts "Oooops. You have entered a number higher than 100!"
when guess =~ /^([w])/
then puts "Ooops. Looks like you have entered a non numeric value!"
when guess == String
then puts "Oooops! Looks like you have entered a non numeric value"
when guess == target
then puts "Good job, #{name}!"
puts "You guessed my number in #{num_guesses} guesses!"
guessed_it = true
end
end
unless guessed_it
puts "Sorry, you didn't get my number. My number was #{target}."
end

Ruby Guessing Game w 'Loop Do'

I created a guessing game through Ruby and I believe the structure of my code is off. When entering 'Cheat', you are given the random number then asked to type it in again. When typed in again, it says the random number is not correct and always defaults to my 'elseif' in line 45.
puts "Hey! I'm Sam. What's your name?"
name = gets
puts "Welcome #{name}. Thanks for playing the guessing game.
I've chosen a number between 1-100.
You'll have 10 tries to guess the correct number.
You'll also recieve a hint when you're guess is wrong.
If you feel like being a big ol cheater, type 'Cheat'.
Let's get started..."
random_number = rand(1...100)
Cheat = random_number
counter = 10
loop do
break if counter == 0
divisor = rand(2...10)
guess = gets.chomp
break if guess.to_i == random_number
counter -= 1
if
guess == random_number
puts 'You guessed the right number! You win!'
end
if counter < 4
puts "You can go ahead and cheat by typing 'Cheat'..."
end
if guess.to_s.downcase.eql? "cheat"
puts "The random number is #{random_number} you CHEATER!! Go ahead and type it in..."
guess = gets.chomp
puts = "You win cheater!"
end
if
guess.to_i < random_number
puts 'Ah shucks, guess again!'
guess = gets.chomp
elsif
guess.to_i > random_number
puts 'Too high, guess again!'
guess = gets.chomp
end
if random_number % divisor == 0
puts "Thats not it.\n #{guess} is #{guess.to_i > random_number ? 'less' : 'greater'} than the random number.
The random number is divisible by #{divisor}.\nTry again: "
elsif
puts "That's not the random number.\n #{guess} is #{guess.to_i > random_number ? 'less' : 'greater'} than the random number.
The random number is NOT divisible by #{divisor}.\nTry again: "
end
end
if counter > 0
puts "The number is #{random_number}! You win!"
else
puts "You lose! Better luck another time."
end
this is the response i get in the terminal
Let's get started...
Cheat
The random number is 96 you CHEATER!! Go ahead and type it in...
96
Thats not it.
96 is greater than the random number.
The random number is divisible by 8.
Try again:
The problem is here:
puts = "You win cheater!"
You're assigning the string "You win cheater!" to a local variable named puts. Changing it to this fixes the problem:
puts "You win cheater!"
You'll probably also want to put a break after that line.
As an aside, this pattern:
loop do
break if counter == 0
# ...
end
...would be better expressed as:
while counter > 0
# ...
end
...or:
until counter == 0
# ...
end
Also, you should always put the condition for an if/elsif/whathaveyou on the same line as if et al. Why? Because if you don't you get bugs like this:
if random_number % divisor == 0
# ...
elsif
puts "..."
end
Can you spot the bug? You forgot to put a condition after elsif, or used elsif when you meant to use else, which means that the return value of puts (which is always nil) is being used as the condition, just as if you had written elsif puts "...".
If you make a habit of always putting the condition on the same line as if/elsif, your eye will get used to it and errors like this will jump out at you.

How to restart script from the beginning?

I decided to make a number-guessing game. Here is the code.
print "Guess a number from 1-20. You have 5 guesses!"
guess1=gets.chomp
guess1=guess1.to_i
random=1 + rand(20)
random=random.to_i
if guess1 == random
puts "Correct! You win!!!"
sleep(5)
Kernel.exit
elsif guess1 > random
puts "Wrong! Too high. Try again!"
else
puts "Wrong! Too low. Try again!"
end
guess2=gets.chomp
guess2=guess2.to_i
if guess2 == random
puts "Correct! You win!!!"
sleep(5)
Kernel.exit
elsif guess2 > random
puts "Wrong! Too high. Try again!"
else
puts "Wrong! Too low. Try again!"
end
guess3=gets.chomp
guess3=guess3.to_i
if guess3 == random
puts "Correct! You win!!!"
sleep(5)
Kernel.exit
elsif guess3 > random
puts "Wrong! Too high. Try again!"
else
puts "Wrong! Too low. Try again!"
end
guess4=gets.chomp
guess4=guess4.to_i
if guess4 == random
puts "Correct! You win!!!"
sleep(5)
Kernel.exit
elsif guess4 > random
puts "Wrong! Too high. Try again!"
else
puts "Wrong! Too low. Try again!"
end
guess5=gets.chomp
guess5=guess5.to_i
if guess5 == random
puts "Correct! You win!!!"
sleep(5)
Kernel.exit
elsif guess5 > random
puts "Wrong! Too high. Game over!"
sleep(5)
Kernel.exit
else
puts "Wrong! Too low. Game over!"
sleep(5)
Kernel.exit
end
How would I add a try-again option at the end that would restart the game?
As Sergio said, a very clean solution would be to learn about functions, and divide up your game logic, so that you can call the function(s) when needed.
Another solution would be to use loops, specifically a do...while loop.
Side note: The begin...while style of looping in the tutorial link I posted is not recommended by Matz, the creator of Ruby. He recommends the loop do...break end style, which is what I will demonstrate.
I'll let you read the tutorials to learn more about whats going on, but the gist is that this particular style of loop will run your code once, and it will either loop back and run it again, or exit the loop and the program will end, depending on the result of our "control" variable.
Unfortunately, because of the way you've written your code, wrapping the program in a simple do...while is very awkward because of the Kernel.exit lines, and the fact that you've hard coded 5 guesses which are run in sequence. Since my answer involves loops, I'll quickly show you a good way to refactor the code without too much pain. Please note the comments in the code to understand what's going on.
loop do # The start of the main game loop
random=1 + rand(20)
random=random.to_i
guess_count = 0 # Tracks the number of times the user has guessed
print "Guess a number from 1-20. You have 5 guesses!"
while guess_count < 5 # The guess loop; keep looping up to a max of 5 times
guess=gets.chomp
guess=guess.to_i
if guess == random
puts "Correct! You win!!!"
sleep(5) # 5 seconds is a very long time, I would reduce this to 1 at most
break # This causes the 'guess loop' to end early
elsif guess > random
puts "Wrong! Too high. Try again!"
else
puts "Wrong! Too low. Try again!"
end
guess_count+= 1 # increment the guess count if the user guessed incorrectly
end
puts "Would you like to play again? (y/n)"
play_again = gets.chomp
break if play_again != "y" # exit the main loop if the user typed anything except "y"
end # The end of the main loop, and thus the entire program
# No need for Kernal.exit. The program is done at this point.
Note: I removed your comments so they don't interfere with the explanation. Feel free to put them back in your version.
Take a look at loops in the tutorials for more details. Hope thats clear.
What you want to do is make the main thread of your game a loop:
loop do
# Prompt
end
This will execute endlessly whatever is inside it until an exception is raised or the program is interrupted.
Now, to make it effective, you'll want to start wrapping up your game logic in an Object.
For instance
class GuessingGame
def initialize
#secret = 1 + rand(20)
#guesses_remaining = 5
end
def is_it?(number)
#guesses_remaining -+ 1
#secret == number
end
end
Now, when you start the game look, you just make GuessingGame.new, and after the game is over, by running out of guesses, or getting it right, you can just prompt to retry and make a new guessing game
First, extract the repeated part into a method:
def correctly_guessed?(target)
guess = gets.to_i
if guess == target then puts "Correct! You win!!!"; sleep(5)
elsif guess > target then puts "Wrong! Too high. Try again!"
else puts "Wrong! Too low. Try again!"
end
end
Then, restructure your code:
loop do
print "Guess a number from 1-20. You have 5 guesses!"
target = 1 + rand(20)
5.times{break if correctly_guessed?(target)}
print "Restart the game? (Y to restart)"
break unless gets.chomp == "Y"
end

Ruby script need fix

I'm having a problem with my ruby script. If anyone could help, I'd really appreciate it. The problem is that the number is stuck between 1-2; where 2 is too high and 1 is too low. The guesses should be integers only.
#!/usr/bin/ruby
def highLow(max)
again = "yes"
while again == "yes"
puts "Welcome to the High Low game"
playGame(max)
print "Would you like to play again? (yes/no): "
again = STDIN.gets.chomp
if again == 'no'
puts "Have a nice day, Goodbye"
end
end
end
#This method contains the logic for a single game and call the feedback method.
def playGame(max)
puts "The game gets played now"
puts "I am thinking of a number between 1 and #{max}." #It show what chosen by user
randomNumber = rand(max)+ 1
print "Make your guess: "
guess = STDIN.gets.chomp
feedback(guess, randomNumber)
end
#Start while loop
#Logic for feedback method. It's ganna check the guess if it's high or low.
def feedback(guess, randomNumber)
count = 1
while guess.to_i != randomNumber
count = count + 1
if guess.to_i < randomNumber
print "That's too low. Guess again: "
else
print "That's too high. Guess again: "
end
guess = STDIN.gets.chomp
end
puts "Correct! You guessed the answer in #{count} tries!"
end
highLow(ARGV[0])
Change your last line to this:
highLow(ARGV[0].to_i)
The ARGV array contains all the passed in arguments as strings, so you have to cast it to integer.

Resources