When I was working on a code on scanning matrix piano keyboard, I had the need to find an element number based on the row, column and column size. For example: Find the order (left to right) of the element at (2,4) in a 5 columns table. //(row, column) [1, 5, 3, 7, 9] [2, 4, 5, 6, 7] [1, 3, 5,…

Some (two) useful formulas that I cannot find on the internet

robtillaart June 18, 2013, 6:12pm 4

Mind you, arrays in C are zero based.

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