Memory, four fields, variable declaration and definition, register, C Embedded Assembly, auto, stack, constant, static variable

Zookeeper

1. Four areas of memory

2. In the program, the variable declaration can have multiple copies, and the definition can only have one copy.

3. The register is in the CPU and there is no address.

4. C language Embedded Assembly Language

5. Auto variable

Automatically allocates memory and releases memory.

6. The stack size is determined by the compiler.

Modify the stack mode, right-click the project, and choose Properties> system> reserved stack size from the context menu.

7. program with no CPU or memory

8. After applying for a space on the stack and assigning a value, the content cannot be released. You need to release the space by using the free method.

9. constant strings are in the code area. The Code area is smart read.

10. Constant nature

10. Differences between static and global variables

A global variables can be used across files

B INTA = 10; equivalent to: Declaration + assignment = Definition

C: The static zone and the program coexist. The static zone allocation takes precedence over the main function.

D: Stack zone: Recycling and releasing.

E: The global variables for static reading are only accessible in this c file.

Extern: declares an externally defined variable.