The first week of learning: const keyword

1) Define constant
2) Define constant pointer
const int* p =&n

• Can not modify the contents of the constant pointer
• It is not possible to assign a constant pointer to a non-const pointer, and vice versa, but it can also be coerced (better not)
• The function parameter is a constant pointer to avoid accidentally modifying the content pointed to by the parameter pointer within the function. For example strcpy(p,"this"), if p is a parameter, the content pointed to by p is modified.
• int* const pIt is not possible to modify the address pointed to by the pointer
  3) Define often quoted