2015.12.10 hands

The "rendering" that you hear before learning the pointer is this: the pointer is the hardest. The feeling that comes after touching the pointer today is, "well! That's it! ”

A pointer is a special variable ( A pointer is also a variable ), and the value stored in it is interpreted as an address in memory. To make sense of a pointer, you need to understand the four aspects of the pointer: the type of the pointer, the type the pointer is pointing to, the value of the pointer, or the memory area called by the pointer (the name of the array is actually an address, pointing to the first address of the array), the memory area occupied by the pointer itself (32 bits 4 64 bits of 8 characters).

Note: pointers can only point to a block address and cannot be given a constant value .

int *p = 10; This is a mistake!

& Address Eg:&a Get the address of a

int *p = &a; This is the right definition.

* Role of the number: 1. Define a pointer variable.

2.* (pointer variable) Gets the value of the variable pointed to by the pointer.

　　　　　　　　

　　

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2015.12.10 hands