Shulou(Shulou.com)06/01 Report--

This article mainly introduces the example analysis of pointer and memory management in CAccord +, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it.

Pointer and memory management are always easy to be blurred knowledge points, but they often deal with pointers in programming, especially on the lower computer. If the concept is vague, redundant code will be written out accidentally, which may cause extra memory overhead or directly affect the running speed.

one。 Pointer

1. Computer memory is mainly divided into these areas, each area is divided into countless bytes (Byte), each byte (Byte) has a unique number, and this number is the pointer address of this byte. In general, the only areas that a program can read and write are global variables, stack area and stack area. The following is a schematic diagram of computer memory:

The numbered address for each byte (Byte) is the pointer address:

On X86 systems, each byte (Byte) consists of 8 bits (bit):

two。 Pointers and variables

When defining a variable, such as int a = 1025, under X86, IDE applies for a consecutive 4-byte (Byte) size on the stack to store this number. As shown below:

This byte size can be viewed with sizeof (int).

So for int variables, the 4-byte numbered address is the pointer address of the variable.

3. Byte and bit

4. The pointer to the pointer, p holds the address of the pointer to x, while t stores the address of p.

5. Variables in the heap, new a piece of memory in the heap area.

two。 Array

1. One-dimensional array

two。 Character array

3. Two-dimensional array

Thank you for reading this article carefully. I hope the article "sample Analysis of pointers and memory Management in Cumberbatch + shared by the editor will be helpful to you. At the same time, I also hope that you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!"

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.