Need code for shifting numbers.

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1

I have 10 pushbuttons connected to my Arduino numbered from 0 to 9 and I need a 3-digit variable that's changing as one presses the pushbuttons;

ex. Press 4 Variable: 004
Press 6 Variable: 046
Press 7 Variable: 467
Press 3 Variable: 673 etc.

Please help.

2

What you are looking for is arrays.
First you declare your arrays (call them array[2] and lastarray[2].

In your loop, you first make lastarray equal to array (for i= 0 to 2)

Then you look for button changes. If a button is changed, the number will be the new array[2], array[1] will be lastarray[2] and array[0] will be lastarray[1]

There are probably more elegant ways to do this, but if you are not running too much other calculations, it should work.

Joachim

3

You don't need an array at all. Define an int, value. Set it to 0.

When a button is pushed:

value *= 10;
value += btnNumber;
value %= 1000;
4

You don't need an array at all. Define an int, value. Set it to 0.

When a button is pushed:

value *= 10;

value += btnNumber;
value %= 1000;

Smart way to do it.

Personally, I'd get lazy and do this:

if (digitalRead(button1) == HIGH) {
first = second
second = third
third = 1
}

and repeat the code for all of the buttons.

Don't forget to debounce though.

5

But you'd also need a function that deletes the first number after every three presses

"% 1000" ?

6

"% 1000" ?

Whoops. Didn't notice that the first time :P. I'll modify my original post. ;D