Computer Science – 10.2 Arrays | e-Consult
10.2 Arrays (1 questions)
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A 2D array is the most appropriate data structure for storing the enemy positions. Reasoning:
- Direct Representation: The 2D array can directly represent the 2D map, where each row corresponds to a y-coordinate and each column corresponds to an x-coordinate. The value at each cell in the array can represent the presence or absence of an enemy at that position.
- Efficient Access: Given an enemy's x and y coordinates, we can directly access its position in the 2D array using the coordinates as indices. This provides O(1) access time.
- Spatial Relationship: The 2D array naturally reflects the spatial relationship between enemies on the map.
- 1D Array Inefficiency: Storing the enemy positions in a 1D array would require a more complex mapping scheme (e.g., using a separate array to store x and y coordinates), making access less direct and potentially less efficient.
Example:
| X | Y |
For example, if we have three enemies at positions (1, 2), (3, 4), and (5, 6), the 2D array would be:
[
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0]
]
Where a value of 1 in a cell indicates an enemy is present at that position, and 0 indicates no enemy.