Dungeon master

Dungeon master

Will you pass the skill check?

In a role playing game a player must perform a skill check if they want to succeed in an action they are attempting. Skill checks are performed with a twenty sided dice. The player has a skill (e.g. dexterity) and a modifier (to reflect any advantages or disadvantages in the situation). The skill and modifier are both integers. The skill, plus the dice roll, plus the modifier (which could be a negative number) must be more than a value decided by a “dungeon master” (the DM value) to succeed.

Make


Write a program to output the result of a skill check. The user enters the skill value, the modifiers value and the number needed to pass. A roll of 1 is always a fail and a roll of 20 is always a success before skill and modifiers are taken into account. If the skill value, plus the modifiers is greater than equal to the number required to pass, the skill check is passed.

Use this boilerplate code as a starting point:

Success Criteria

Remember to add a comment before a subprogram, selection or iteration statement to explain its purpose.

Complete the subprogram called `check_skill` that:

  1. Returns one of five possible outcomes:
  2. Automatic pass: if skill plus modifiers is greater than or equal to the DM value plus 5. No dice is rolled.
  3. Critical fail: if the roll is a 1.
  4. Critical success: if the roll is a 20.
  5. Check passed: if the skill plus roll plus the modifier is greater or equal to the DM value.
  6. Check failed: if the ability plus roll plus the modifier is less than the DM value.

Complete the `main program` so that:

  1. The user can input the skill value as a positive integer.
  2. The user can input the modifier value as a positive or negative integer.
  3. The user can input the DM value.
  4. The outcome of the skill check is output.

Typical inputs and outputs from the program would be:

Enter the skill value: 15

Enter any modifiers: 2

Enter the number to pass: 12

Automatic pass


Enter the skill value: 6

Enter any modifiers: -1

Enter the number to pass: 14

You rolled a 20

Critical success


Enter the skill value: 10

Enter any modifiers: 2

Enter the number to pass: 20

You rolled a 13

Check passed


Enter the skill value: 9

Enter any modifiers: -2

Enter the number to pass: 13

You rolled a 3

Check failed

Knowledge Organiser

Use these resources as a reference to help you meet the success criteria.

Programming guide:

Evaluate


Run the unit tests below to check that your program has met the success criteria.

Enter the skill value: 15

Enter any modifiers: 2

Enter the number to pass: 12

Automatic pass

Enter the skill value: 9

Enter any modifiers: -2

Enter the number to pass: 13

You rolled a 3

Check failed

Enter the skill value: 10

Enter any modifiers: 2

Enter the number to pass: 20

You rolled a 13

Check passed

Enter the skill value: 6

Enter any modifiers: -1

Enter the number to pass: 14

You rolled a 20

Critical success

Check that you have:

  • Used comments within the code to describe the purpose of subprograms, conditions and iterations.
  • Used meaningful identifier names. That means the names of subprograms and variables indicate what they are for.
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