Pointer: the address is the memory resources, synonymous with house number
If your city is a RAM (memory), if you find a home that is through your home address (pointer) to find, but the memory of that type of content area of your home furnishings (pointer content).
Pointer variable: the concept store pointer box
c compiler for this particular concept pointer, there are two questions?
1. Assign a box, the box for how much? ?
In 32bit system, pointer four bytes
In the system, 64bit, 8-byte pointer
A system can be seen, all pointers memory size is the same!
2. box is the address, what is the point to read the way memory is?
We generally see
int * p // expression is a pointer p, she is int4 byte reads the address, which is a one-time reading four bytes.
Similarly char * p // pointer p, a one-time reading bytes.
The int * or char * data can be understood as the mold
Pointer to memory, we must ensure legitimacy.
