Question Constellation Sign up for free AQA · GCSE · Computer Science · Higher
First iteration through puzzle positions
getTile(row, column) returns the tile value at a position on the 3 x 3 board; the blank space is represented by 0.
| int ref1, ref2; |
| for (int i = 0; i < 3; i++) |
| { |
| for (int j = 0; j < 3; j++) |
| { |
| if (getTile(i, j) == 0) |
| { |
| ref1 = i; |
| ref2 = j; |
| } |
| } |
| } |
Explain the purpose of the first iteration structure in the program in Figure 16.
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Marking points
- 1 Explains that the outer/first loop iterates through the board rows.
Full-mark answer
It iterates through the rows of the board.
Why this answer loses marks
It checks the whole board.
This is too broad for the first loop: the answer must identify the board dimension that this loop traverses.