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Author: Svagtlys

CowsAndBulls.py

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+import random
+import string
+import os
+# Create a program that will play the “cows and bulls” game with the user.
+# The game works like this:
+#/1. Randomly generate a 4-digit number *where each digit is unique.
+#/2. Ask the user to guess a 4-digit number. 
+#/3. For every digit that the user guessed correctly in the correct place,
+#    they have a “cow”. 
+#/4. For every digit the user guessed correctly in the wrong place,
+#    they have a “bull.” 
+#/5. Every time the user makes a guess, tell them how many “cows” and
+#    “bulls” they have. 
+#/6. Once the user guesses the correct number, the game is over. 
+#/7. Keep track of the number of guesses the user makes throughout the 
+#    game and tell the user at the end.
+# I actually watched Etho make a version of this game in his Minecraft
+# world recently.  Dunno if he ever finished it....
+
+def isgoodnum(num):
+    '''
+    Takes in a number and determines if it is four in length and only contains digits
+    Returns 1 if yes and 0 if no
+    '''
+    if len(num) == 4 and not 0 in [1 if each.isdigit() else 0 for each in num]:
+        return 1
+    else:
+        return 0
+
+def askforguess():
+    guess = input("Please guess a four digit number.\n")
+    while(not isgoodnum(guess)):
+        guess = input("You must guess a four digit number.\n")
+    return guess
+
+
+def cowsandbulls(mynum, guess):
+    #calc number of digits that overlap in mynum and guess              = overlap
+    #calc number of digits that are in the same spot in mynum and guess = cows
+    #calc overlap - cows                                                = bulls
+    overlap = 0
+    cows = 0
+    bulls = 0
+    for index in range(4):
+        if guess[index] in mynum:
+            overlap += 1
+        if guess[index] == mynum[index]:
+            cows += 1
+    bulls = overlap - cows
+    return "You have "+ "".join(["1 cow" if cows == 1 else str(cows) + "  cows"]) + " and " + "".join(["1 bull." if bulls == 1 else str(bulls) + " bulls."])
+
+
+if __name__ == "__main__":
+    mynum = set()
+    while(len(mynum) < 4):
+        mynum.add(str(random.choice(string.digits)))
+    mynum = "".join(each for each in mynum)                         # mynum is saved as a string
+    numguesses = 0                                                  # numguesses saved as int
+
+    print("My number is " + mynum)
+
+    print("Welcome to the game of Cows and Bulls!  I have written down a number containing four unique digits, and you must guess it!")
+    input("Hit enter when you're ready to start.")
+
+    os.system('CLS')
+
+    while(True): #Will break once player guesses correctly
+        guess = askforguess()                                       # guess is saved as a string
+        numguesses += 1
+        if guess == mynum:
+            break
+        else:
+            print(cowsandbulls(mynum, guess))
+
+    if numguesses == 1:
+        print("You guessed my number in only 1 guess. Sheer luck!")
+    else:
+        print("You guessed my number in " + str(numguesses) + " guesses.")