Can u tell me what is the meaning of the first 2 statements of the first two functions in this image

#1

this is something related to pointers. i am giving the image link

a0298969354dd85a55ccda37750a44d2.jpg565×608 56.8 KB

#2

const char *a means pointer to a constant , it means that constant value at which pointer is pointing cannot be changed but pointer can be made to point to another location

#3

this is ok.
but please explain the meaning of the complete statement.

  1. what does right side mean
  2. what does the complete statement is trying to do.