[002] Primary knowledge pointer

Pointers (pointer) and references implement indirect access to other objects, but unlike references, the pointer itself is an object and does not need to be assigned an initial value when defined. Define pointers in the form of *p.

1 int val, *p2;       // Val is an int type object, p2 is a pointer to an int object

Because the pointer holds the address of the object, you need to use the Fetch address character (&) to get the address.

1 int 1024x768 ; 2 int *pval = &val;        // PVal is a pointer to the Val of the variable

Similar to a reference, in most cases, the type of the pointer is strictly matched to the object it points to.

Not finished.

[002] Primary knowledge pointer