I was learning about recursion using c and there was a question with an array say for example:
void main(){
char str[100];
--snip--
if(*str == 'c')
count++;
--snip--
}
here *str is the value retrieved from the pointer that points to first character of the string str.
My question is what is pointer derefrencing and can i do as follows:
--snip--
str+=1;
--snip--
to get new pointer pointing to the next location of another character in that string?
You cannot increment an array, but you can increment a pointer to an element of the array:
char str[100];
char *pointer = str; //points to the begin
pointer++; //points to the second element
*pointer = 'a'; //sets the second element
str has the type char [100], in some expressions it decays to (e.g. behaves like) a pointer, but it is not a pointer, you cannot assign to str. str = ... or str+=1; is invalid, you can only assign something to an element of an array, not the array itself.
Therefore you have to create a pointer to an element of the array and then you can increment the pointer.
