typedef

[geekocoder]

How can P be a constant in the following code?

typedef char *charp;
const charp P;

[coder777]

the const on line 3 applies to the type charp. The type charp is a pointer to a char. So line 3 defines a const pointer to a char or in other words:

char *const P;

It means that you cannot modify the pointer while the object it points to you can