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In the following slides, I will first show an ordinary algorithm to count mines in a mine field.

Count Mines. In the following slides, I will first show an ordinary algorithm to count mines in a mine field. I will use a 3*4 board as illustration, which can be easily scaled up to a bigger board of any size based on the same principle.

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In the following slides, I will first show an ordinary algorithm to count mines in a mine field.

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  1. Count Mines • In the following slides, I will first show an ordinary algorithm to count mines in a mine field. • I will use a 3*4 board as illustration, which can be easily scaled up to a bigger board of any size based on the same principle. • After that, I will illustrate an improved algorithm and please think carefully. CG1101 (AY2012/13 Semester 1) 1

  2. Ordinary algo. to count mines #1 Case 1 (inner cell) 3*4 mine board score board CG1101 (AY2012/13 Semester 1) 2

  3. Ordinary algo. to count mines #2 Case 2 (boundary cell) 3*4 mine board score board CG1101 (AY2012/13 Semester 1) 3

  4. Ordinary algo. to count mines #3 Case 3 (corner cell) 3*4 mine board score board CG1101 (AY2012/13 Semester 1) 4

  5. Enlarged 5*7 mine board with outer frame of all 0 Improved algo. illustration Original 3*4 mine board CG1101 (AY2012/13 Semester 1) 5

  6. Count Mines • Got it? • Ok, you may get the idea, then how to implement it? • That’s your task  • Hint: you will need to do some major change to the given skeleton if you want to apply the improved algorithm to lab#4 ex5. • Overall, a better algorithm will make your program easier to write and debug. • Therefore, for complex problems, spend some time to thinking about the algorithm before coding! CG1101 (AY2012/13 Semester 1) 6

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