How to define and use a list/array of chars using `Serial.print`

Question

I wish to define a list of months names and access it when printing a report.

Array was defined as follows:

const char months []= {'Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'};

for (int i=0; i<=11; i++) {

                                 Serial.print(months[i]);
                        }

Tries:

I was looking for help under Arrays in Arduino documentation didn't give, as far as I found, any explanation for such case, but arrays of int

Appreciate any help.

I just want to point out that Arduino uses C++. Straightforward questions like this, about how to create and access arrays can be answered by doing a C++ tutorial. There is nothing particularly special about the fact that the code is running on an Arduino. — Nick Gammon, Nov 30 '18 at 20:06
@NickGammon - thank you for your answer. I'm aware of that, but still I did not find any explanation for such case. — guyd, Nov 30 '18 at 20:10
Very good. I try to define and access this list without any success - I suggest for future questions you are more explicit about the problem. I see that I can actually define the array the way you did it without error, but I can see that you would have problems printing it because you used single quotes rather than double quotes. It helps to explain what "without success" actually means. If I said "I tried to bake a cake, without success" how would you advise me? A different recipe? A different technique? A better oven? Better ingredients? — Nick Gammon, Dec 01 '18 at 05:49
@NickGammon - question is now re-written. Hope it is more undrestandable and not "off-topic" — guyd, Dec 01 '18 at 06:01
Very good. I see that there are vote(s) to re-open the question. Most of the moderation here is done by community members, so we'll see what happens to it. — Nick Gammon, Dec 02 '18 at 05:45

score 6 · Accepted Answer · edited Nov 30 '18 at 20:00

6

You are almost there:

Then you get:

const char* months[] =
 {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};

edited Nov 30 '18 at 20:00

Jot

answered Nov 30 '18 at 17:25

Michel Keijzers

Just fixed :-), found this computer has Arduino installed – Michel Keijzers Nov 30 '18 at 17:27
1

The timelib uses progmem and a single string for short names and multiplies the index with 3: https://github.com/PaulStoffregen/Time/blob/master/DateStrings.cpp – Jot Nov 30 '18 at 17:34
@Jot that's also possible, than you just need a function to retrieve the three characters; btw, I didn't see any different in using PROGMEM in my code, maybe it helps if it is just one string (would save 48 bytes). – Michel Keijzers Nov 30 '18 at 17:38
2

const char* regards[] ={"Thank", "you","very","much!!"}; – guyd Nov 30 '18 at 18:26
@Guy.D You're welcome – Michel Keijzers Dec 01 '18 at 10:59

1 Answers1