Ruby Daily (May 21, 2012)

Date	2011/4/10
Name	BullsAndCows
Description	A number guessing game written in Ruby
Filename	BullsAndCowsRuby.rb
Content	Print the following message: Bulls and Cows ============== This is an ancient game with guessing numbers. Draw 4-digit random number. Print the following message: A secret number of 4-digit has been draw! Obtain a 4-digit number or "quit" from user by prompting following message repeatly: Please enter a 4-digit number (or type 'quit' to exit): If the input is "quit" show the following message (replace 0000 with the actual number being drawed The secret number is: 0000 Show the number of digit(s) that have correct position as bull and the number of digit(s) that appeared without exact position as cow. For instance: The random number is 1234 and the user input 1355. Exact position: "1", appeared without exact position: "3". The system should display the following message: 1 bull 1 cow If no digit found n the random number, the following should be shown instead: Neither a bull nor a cow! On the other hand, if the user guess the 4 digits correctly, the system should show the following message instead: 4 bulls! You are a genius! Ask the user to play again if 4 digits have been guessed correctly by showing the following message: Do you want to play a new game (Y/N)? Show the following message if user has chosen to quit the program: Thank you for playing Bulls and Cows!
Sample Input:
Sample Output:
Expected Test Command:	ruby BullsAndCowsRuby.rb

puts("Bulls and Cows")
puts("==============")
puts("This is an ancient game with guessing numbers.")
begin 
	secretDigit=4.times.map{Random.new.rand(0..9)}
	secret=secretDigit.join("")
	puts("A secret number of 4-digit has been draw!")
	bull=0
	begin
		ans=""
		playNextGame=""
		begin 
			$stdout.print("Please enter a 4-digit number (or type 'quit' to exit):")
			ans=gets.chomp
		end while (ans =~ /^\d{4}$|^quit$/)==nil
		if ans=="quit"
			puts("The secret number is: "+secret)
		else
			bull=0
			cow=0
			arr=ans.split("").map{|num| num.to_i}
			for i in 0..3
				if arr[i]==secretDigit[i]
					bull+=1
				end
			end
			for i in 0..3
				for j in 0..3
					if arr[j]==secretDigit[i]
						cow+=1
						arr[j]= -1
						break
					end
				end
			end
			cow=cow-bull
			if cow==0 and bull==0
				msg="Neither a bull nor a cow!"
			else
				if bull==4
					msg="4 bulls! You are a genius!"
				else
					if cow==0
						if bull==1
							msg="1 bull only."
						else
							msg=bull.to_s+" bulls only."
						end
					else
						if bull==0
							if cow==1
								msg="1 cow only."
							else
								msg=cow.to_s+" cows only."
							end
						else
							if bull==1
								msg="1 bull and "
							else
								msg=bull.to_s+" bulls and "
							end
							if cow==1
								msg+=" 1 cow."
							else
								msg+=cow.to_s+" cows."
							end
						end
					end
				end
			end
			puts(msg)
		end
	end until bull==4 or ans=="quit"
	if ans!="quit"
		begin
			$stdout.print("Do you want to play a new game (Y/N)?")
			playNextGame=gets.chomp
		end until playNextGame.upcase=="Y" or playNextGame.upcase=="N"
	end
end until playNextGame.upcase!="Y" or ans=="quit"
puts("Thank you for playing Bulls and Cows!")

Date	2011/4/9
Name	Add Two Numbers
Description	Add Two Numbers using Ruby
Filename	AddTwoNumRuby.rb
Content	Using the Standard input stream to enter different numbers or text Find two integers each time and, Display output the sum to the standard output stream. Repeat the all the steps until an EOF (End of File) signal received
Sample Input:	123 3.5 dsfasd 4 fdsafds 6
Sample Output:	126 0
Expected Test Command:	ruby AddTwoNumRuby.rb < testdata.txt

begin
	nCount=0
	total=0
	while true
		temp=gets.chomp.split(/\s+/)
		temp.each do|n|
			begin
				if nCount%2==0
					total=Integer(n)
					nCount+=1
				else
					number2=Integer(n)
					total+=number2
					nCount+=1
					$stdout.print(total.to_s+" ")
				end
			rescue
			end
		end
	end	
rescue
end

Date	2011/4/8
Name	Hello Friend
Description	Ask user's name and echo greeting message to user using Ruby
Filename	HelloFriendRuby.rb
Content	Using the Standard output stream to prompt your:"Your name?" Then use the input stream to receive input from user. Display the greeting message "Hello, [user name]!" using standard output stream. Repeat all the steps until users press CTRL-Z (MS windows) or CTRL-D (Mac) or receive the EOF signal.
Sample Input:	Peter Pan
Sample Output:	Hello, Peter Pan!
Expected Test Command:	ruby HelloFriendRuby.rb < testdata.txt

begin
	while true
		print("Your name?")
		name=gets.chomp
		puts("Hello, "+name+"!")
	end
rescue
end

Date	2011/4/7
Name	Hello World
Description	Display greeting message to user using Ruby
Filename	HelloWorldRuby.rb
Content	Display the greeting message "Hello, World!" using standard output stream by Windows Scripting File using JScript
Sample Input:
Sample Output:	Hello, World!
Expected Test Command:	scalac HelloWorldScala.scala scala HelloWorldScala

puts("Hello, World!")