I have a huge number of arrays, each with a series of numbers each referring to an LED on a strip. I want to be able to address each one by a number, so the logical solution to that for me was to make the whole thing into an array. Can that be done, or is there a better work around that can be implemented?
1 Answer
Yes you can have arrays inside arrays.
The array would be declared as:
int arrayName [ x ][ y ];
where x
is the number of rows and y
is the number of columns.
The example below declares and initializes a 2D array with 3 rows and 10 columns:
int myArray[3][10] = { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 },
{ 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 },
{ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 } };
To access the value of 27 (and save it into myValue):
myValue = myArray[2][6];
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stackoverflow.com/q/11363226/6075112 and stackoverflow.com/a/936702/6075112 Commented Feb 13, 2018 at 0:49
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1It would be worth adding than this 2D array is actually an array of 3 arrays of 10 numbers. Not all programming languages use row-major order. Commented Jun 24, 2018 at 19:22
za[] = {a, b};
I try it before with led array, who another person defining letters as binary code, and I was trying update that code and use next array to store set of letters which will use defining arrays from rows with binary code.