STRLEN() doesnt return a expected number - Arduino Forum
Dec 13, 2024 · 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 …
strlen() - keep the length of the string in a variable
Dec 23, 2015 · How can i keep the length of the string in a variable? for exemple: strlen (name); And then i want to save that number. how can i do that?
How to Use strlen_P - Programming - Arduino Forum
May 3, 2019 · Hi, Can anyone offer advice on how to use strlen_P to obtain the length of a string in progmem? In the example below, each of the four strings is length 1, 2, 3, and 4.
Question about size_t and strlen () - Arduino Forum
Jan 8, 2021 · strlen () is very different than sizeof: sizeof is part of the language, it gives you the number of bytes allocated for a variable. strlen () is a function call, part of the many standard …
Sizeof with char* - Programming - Arduino Forum
May 3, 2021 · I'm using sizeof and strlen. With the char* strings I get back the right number from strlen, but it always kicks back "2" from sizeof. Doing the same with a string - that doesn't use …
[SOLVED] VirtualWire and const char * msg - Arduino Forum
Jan 29, 2016 · In the transmitter example for VirtualWire, the message being sent is declared as const char *msg = "hello"; But what do I do if I want be flexible in the message I am sending? …
Sizeof one strings in an 2D array - Arduino Forum
Apr 26, 2010 · The strlen function counts the number of non-NULL values in the array, before the first NULL. By convention NULL is the value of a pointer. It is only a convention, but so are …
sizeof vs. strlen and passing a char array to a function
Jun 4, 2013 · I know one returns the size of the actual variable, in the case of a string, it's the number of characters plus the null ending, but something seems weird to me, since when I ask …
strlen and PROGMEM - Programming - Arduino Forum
Jan 4, 2020 · strlen_P(reinterpret_cast<const char *>(text)) Reinterpret_cast is dangerous, and can only be used in a very limited number of cases: reinterpret_cast conversion - …
Trying to understand const char usage - Arduino Forum
Jan 6, 2018 · I am in that precarious position of "having a little knowledge is dangerous" ! This pertains to a code snippet from the VirtualWire library which i'm trying to comprehend. This …