Note that unlike the call to strncat, the call to strncpy above does not append the terminating NUL character to d when s1 is longer than d's size. Using indicator constraint with two variables. The term const pointer usually refers to "pointer to const" because const-valued pointers are so useless and thus seldom used. Notice that source is preceded by the const modifier because strcpy() function is not allowed to change the source string. Copy part of a char* to another char* Using Arduino Programming Questions andresilva September 17, 2018, 12:53am #1 I'm having a weird problem to copy the part of a char* to another char*, it looks like the copy is changing the contents of the source char*. How to use a pointer with an array of struct? You do not have to assign all the fields. J-M-L: How to copy contents of the const char* type variable? Which of the following two statements calls the copy constructor and which one calls the assignment operator? I don't understand why you need const in the signature of string_copy. It's important to point out that in addition to being inefficient, strcat and strcpy are notorious for their propensity for buffer overflow because neither provides a bound on the number of copied characters. Ouch! Using the "=" operator Using the string constructor Using the assign function 1. char const* implies that the class does not own the memory associated with it. I tried to use strcpy but it requires the destination string to be non-const. Copy Constructors is a type of constructor which is used to create a copy of an already existing object of a class type. We make use of First and third party cookies to improve our user experience. Trying to understand const char usage - Arduino Forum var ins = document.createElement('ins'); Because the charter of the C standard is codifying existing practice, it is incumbent on the standardization committee to investigate whether such a function already exists in popular implementations and, if so, consider adopting it.