How to inicialise a variable char array in Arduino

Projects Programming
1

I need to initialize this variable inside the loop in Arduino, how can I do?

Here in my code but none works

char buffer[100];

void setup() {
  Serial.begin(115200);
  .
  .
}

void loop() {
.
.
  buffer[] = Null;
  buffer[] = "";
  buffer[] = " ";
.
.
}
2

char buffer[]="something";

or

char buffer[100];
buffer[0]='s';
buffer[1]='o';
...

or use functions like strcpy() or memcpy().

3

Your variable is global so it is initialized to zeroes for you. Did you want some different value?

If you want to set it BACK to an empty string:
buffer[0] = '\0';

4

Which of these codes is the best and effective method to initialize a char array?

buffer[0] = '\0';
strcpy( buffer, "");
memset( buffer, NULL, sizeof(buffer));
5

For local array - this one:

or
memset( buffer, 0, sizeof(buffer));
if you need to clear it contents explicitly.

Global arrays initialized automatically by compiler

6

buffer[0] = '\0';

Unless you are doing weird non-standard things with the array that you have chosen to not share.

This answer follows directly from the standard termination method, if you don't understand why, please study C strings, any reasonable tutorial will explain it.

7

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.