Hi All, I wonder if someone could tell me if I can create variables within the programme? I am trying to create a programme that has an unknown number of steps. What I would like to do would be to enter a number of steps from a keypad and then later, be able to add data into those steps. As a quic…

The short answer to your question is no, you cannot create variables as you put it in a sketch that is running, at least not without a degree of memory management that you really don't want to get into What you can do, of course, is to give an existing variable a value. The solution to your proble…

you are right, I have not used arrays. But thank you for pointing me in the right direction. I shall start reading now :slightly_smiling_face: :+1:

You will find that your attempts using var() was very close to to the solution using arrays

[image] Ilprofessore: for (int i=0; i<10; i++){ int var(i); } Syntax errors aside, this creates a variable var that is only known inside that for-loop; it will not exist outside that for-loop. There are two ways to achieve what you want 1) Use an array that is big enough to hol;d the max…

I don't think that dynamic memory allocation has much to offer except the danger of using it If the sketch has to be able to run with say 100 data items in the array if the user enters that many then it might just as well be allocated to the array in the first place. It is not wasted, rather it i…

I am slowly getting there, but my problem is still trying to create the number of variables in either the setup, or the loop. If I can give a little more explanation of what I am trying to achieve, it would help.... I am trying to create a very simple lighting controller for a small local charity t…

Your most obvious mistake is here in setup() int n[(numb)]; You are declaring an array local to setup() that will not be available outside of that scope Declare the array as a global with the maximum number of levels that is to be allowed and declare a global variable to be used as the nu…

:grinning: Actually, I think I am having fun :smile: I think I have my solution; at least in the early stages. so, the next iteration is as follows :- #include <Keypad.h> const byte ROWS = 5; //four rows const byte COLS = 4; //three columns char keys[ROWS][COLS] = { {'A','B','#','*'}, {'1',…

This stuff is not only fun, it is addictive It sounds like you are on your way but can I suggest that you do not use arrays of Strings. Judging by their names they are actually numbers so could be held as integers which would be much more memory efficient and you do not need the use of a function …

The reason for the strings is just as a capture device to take a keypad entry and then convert to an integer and then returned to a zero length of string after the conversion. It probably is a clumsy way to capture the numbers, but I have found it works reliably. a quick sample example from anothe…

Automatically creating variables

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UKHeliBob May 16, 2023, 10:01am 17

The important thing is that it works but take a look at Keypad data entry. A beginners guide

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Automatically creating variables

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