Cows-and-bulls(4digits).md

11.4: Bulls and Cows (4 digits)

The Problem

Create a bulls and cows game for guessing a randomly generated 4 digits number.

Hints

This one should be easier for you. Just make sure that the random number is four digits. Hence, it should be between 1000 and 9999.

To calculate the bulls and cows,

Solution

import random

secret_number = str(random.randint(1000, 9999))
print("Guess the number. It contains 4 digits.")

remaining_try = 7

def get_bulls_cows(number, user_guess):
   bulls_cows = [0,0] #cows, then bulls
   for i in range(len(number)):
       if user_guess[i] == number[i]:
           bulls_cows[0] += 1
       elif user_guess[i] in number:
           bulls_cows[1] += 1
   return bulls_cows

while remaining_try > 0:
   player_guess = input("Enter your guess: ")
  
   if player_guess == secret_number:
       print("Yay, you guessed it!")
       print("YOU WIN.")
       break
   else:
       bulls_cows = get_bulls_cows(secret_number,player_guess)
      
       print("Bulls: ",bulls_cows[0])
       print("Cows: ",bulls_cows[1])

       remaining_try -= 1

       if remaining_try < 1:
           print("You lost the game.")
           break

Try it on Programming Hero

Explanation

After solving the Bulls and cows for 2 digits, this one should become easier for you.

However, solving this one by using if-else that we did for 2 digit bulls and cows game will become very harder.

That's why we created the get_bulls_cows function. Inside that, we created a loop. For each digit, check the digit in the same place.

   

tags: programming-hero python python3 problem-solving programming coding-challenge interview learn-python python-tutorial programming-exercises programming-challenges programming-fundamentals programming-contest python-coding-challenges python-problem-solving