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Two-Dimensional Arrays

Two-Dimensional Arrays. Robert Reaves. Two-Dimensional Array. Used to represent items in a table with rows and columns, of the same data type. Good for representing board games, where the screen is though of as a two-dimensional array.

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Two-Dimensional Arrays

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  1. Two-Dimensional Arrays Robert Reaves

  2. Two-Dimensional Array • Used to represent items in a table with rows and columns, of the same data type. • Good for representing board games, where the screen is though of as a two-dimensional array. • A component in a two-dimensional array is accessed by specifying the row and column indexes of the item. • Think of a map!

  3. Array Declaration • DataTypeArrayName [ ConstIntExpression ] [ ConstIntExpression ]; • Example: • constint NUM_ROWS = 100; • constint NUM_COLS = 9; • float alpha [NUM_ROWS][NUM_COLS];

  4. Array Access • To access an individual component of an array, two expressions are used to specify its position. • Array Component Access • ArrayName [ IndexExpression ] [ IndexExpression ]; • Example: • alpha[0][5] = 36.4;

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