Bowling Scoring System Challenge

bowling_exercise.md

Challenge:

Write a program that counts and sums the scores of a bowling game for a single player.

Game features:

• 1 player only
• There are 10 pins in a frame
  • The objective in each frame is for the player to knock down all the pins
  • A player is allowed a maximum 2 rolls per frame
• There are 10 frames in a single game
• The highest score possible is 300

Scoring rules:

• If in a single frame, the player is unable to knock down all the pins, the score for the frame is the sum of the 2 rolls
  • i.e. if the player rolls 5,4 then the score is 5 + 4 = 9
• If in a single frame, the player is able to knock down all the pins with 2 rolls, the player has scored a spare.
  • the score for a space is the sum of the number of pins knocked down + the number of pins knocked down in the next roll
  • i.e. if the player rolls 4,6 | 5,0 then the score is 4 + 6 + 5 = 15 and 5 + 0 = 5 over the 2 frames
• If in a single frame, the player is able to knock down all the pins with the 1st roll, the player has scored a strike
  • the score for a strike is the sum of the number of pins knocked down + the number of pins knocked down in the next 2 rolls
  • i.e. if the player rolls 10 | 5,4 then the score is 10 + 5 + 4 = 19 and 5 + 4 = 9 over the 2 frames

Scoring the 10th frame

• If the player scores a spare, then they are given an extra roll.
  • the score is the sum of all 3 rolls.
• If the player scores a strike, then they are given an extra 2 rolls.
  • the score is the sum of all 3 rolls.

Implementation details

• Please develop this program in Java - you're more than welcome to use Java 8
  • to help, the interface should look like:

  scoringGame.roll(numberOfPins); scoringGame.score();
  

• Do not use an external libraries or frameworks to create the program (unless it is used for testing e.g. JUnit or Mockito)
• No GUIs - a command line program is sufficient.

Submission

Please upload on dropbox a zip file containing the solution. This will include the source code (including any test code) and a pre-packaged jar file that can be executed.

The upload link: https://www.dropbox.com/request/GJvHRjT58enYjfqvetGZ