[SOLVED]Red message while compiling

[kunstmaan2024]

If I see this whilst compiling:

C:\Users\Harry A\AppData\Local\Temp\.arduinoIDE-unsaved20241115-30900-ob6l1n.6quj\sketch_dec15b\sketch_dec15b.ino:17:16: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
 char *CHKstr = "90.0\0";
                           ^~~~~~~~

What should I do??

[MrY]

Change this to:

char CHKstr[] = "90.0\0";

[sterretje]

Make it a const char ?

There are a few details missing

1. Sometimes this is just a warning; it depends on the configuration of the compiler which in turn depends on the board used. For AVR boards, it's just a warning, for ESP32 boards it might be an error.
2. Your sketch (or a stripped down version that shows the message).

Note:
Why do you add the '\0'? Because the "90.0\0"; is between double quotes, it's already a nul-terrminated character array.

[b707]

@kunstmaan2024
The problem is exact the same as in your last topic:

STRLEN() doesnt return a expected number

I know this function cant go wrong so I must be doing something wrong. bool newData = true; char *AXpos; char *EYpos; const char *delimiter = ","; //char inData[numChars]; // an array to store the received data char inData = "123.45,678.90\n"; // an array to store the received data void setup() { // put your setup code here, to run once: Serial.begin(9600); // initialize serial communication while (!Serial) { delay(0); } } void loop() { // put your main code here, to run repe…

I would recommend to you take a break in your project and read about working with char and char arrays in C/C++

[J-M-L]

@kunstmaan2024

What should I do??

Do what the compiler says

const char *CHKstr = "90.0";  //no need for the trailing null char, string literals get one automatically 

[kunstmaan2024]

@J-M-L

Do what the compiler says

const char *CHKstr = "90.0";  //no need for the trailing null char, string literals get one automatically 

removing the /0 still gives a error

[jremington]

@kunstmaan2024

still gives a error

Post the error message.

You could also try the working example program I posted in one of your other several other cross posts on this same topic.

Flagged for moderation.

+1 for this suggestion:

I would recommend to you take a break in your project and read about working with char and char arrays in C/C++

[kunstmaan2024]

@jremington

Flagged for moderation.

+1 for this suggestion:

?? am I being kickt of this forum??

[2112]

Reading this may help

Serial Input Basics - updated

Updated Version Please note that this is a revised version of the advice in this earlier Thread which has become very long. As far as possible I have kept the code examples identical or simplifed them slightly. It should not be necessary to refer to the older Thread, but feel free to do so. Contents The following sections are in this Tutorial Introduction Serial data is slow by Arduino standards Example 1 - Receiving single characters Why code is organized into functions Exampl…

[kunstmaan2024]

@sterretje

Note:
Why do you add the '\0'? Because the "90.0\0"; is between double quotes, it's already a nul-terrminated character array.

Thnx did not know this

[Coding_Badly]

I'm struggling to see the connection between a post being flagged for moderation and you being "kickt of this forum".

I assume you meant "kicked off this forum" but experience has repeatably demonstrated making assumptions to be a poor choice. I'm relying on you to correct any mistakes. A good place to start is with your own post.

The flag is for cross-posting. If that's accurate then this would be an excellent time to stop doing that. Possibly even apologize for wasting people's time.

[Coding_Badly]

Ah yes. This thread is painfully similar to at least one other. While you are certainly welcome to create multiple threads, you are not welcome to create multiple threads about very similar topics. Doing that delays you getting a good answer and wastes the time of those trying to help. Please do not cross-post.

[kunstmaan2024]

@Coding_Badly

I assume you meant "kicked off this forum"

youre correct, but please keep in mind that my native language is dutch ,not enlisch and I am 3/4 blind. I have to read the forum and code with a special program.