Use Case 6--Exit Game

Context of use:
When the game ends, the program should know which steps to follow based on the type of exit made by the user
　

Scope:
J2ME Pac-man Game Application
　

Level:
User Goal
　

Primary Actor:
Mobile Phone or PDA User
　

Stakeholders and Interests:
User: wants the game to exit smoothly
　

Precondition:
The user of the game has hit the exit button, lost all three lives, or beat the game. We know which of the scenarios is in effect and the game finishes accordingly.
　

Minimal Guarantees:
The device will not be left in a hung state.
　

Success Guarantees:
The device will be returned to the state it was in before the game was played.
　

Trigger:
Player hits button, beats game, or loses all three lives.
　

Main Success Scenario:
　

• 1. User has exited the game.
  　
• 2. The high scores are displayed.
  　
• 3. The device is returned to the state it was in before the game was played.
  　

Extensions:
　

• la. All 3 lives have been lost.
  　
• 1b. User selects to quit the game.
  　
• 1c. User completes the final stage (beats the game).
  　
• 1d. Completion screen is displayed.
  　
• 2a. User has a score greater than one of the high scores.
  　
  • 2al. User is asked to enter name.
    　
  • 2a2. High score is updated and displayed.
    　

Technology and Data Variations:
None
　

Related Information:
PacMan Use Case 6 Collaboration Diagram
PacMan Use Case 1 and 6 Class Diagram
PacMan Package Diagram
Pac Man Use Case Model