cannot re assign auto global variable files

1. Can a local variable be renamed with a global variable? A: Yes. Global blocking will be performed in some cases. To use global variables, you must use "::" A local variable can have the same name as a global variable. A local variable with the

All variables in C language have their own scopes. The types of declarative variables are different, and their scopes are also different. Variables in C language can be divided into local variables and global variables according to the scope.I.

First, a few concepts:1. From the lifetime of the variable, can be divided into static storage mode and dynamic storage modestatic Storage: How the system allocates a fixed amount of storage space (global variables) during program runDynamic storage:

The following memory is reprinted: Source Address: http://blog.csdn.net/yueyahe/archive/2006/05/15/729126.aspx I. reentrant Functions1) What is reentrant?The reentrant function can be used concurrently by more than one task without worrying

Chapter 2 variables and basic types, Chapter 2 variable types 1. Bit, byte, word, KB Bit, the smallest data unit in an electronic computer. The status of each digit can only be 0 or 1. Byte, minimum addressable memory block, basic unit of storage, 1

"C Program Design" Reading notes Keywords: C languageOriginal author name: Loose_wentThe original source of the article: vczx.com---http://www.vczx.com/minute_c.php Written in front: "C Program Design" can be said to be a foundation of the

Static variables are scoped to a file, space is allocated at the beginning of the program, Space is freed at the end, default is initialized to 0, and its value can be changed when used.static variables or static functions only the code in this file

Static variables are used in a file. Space is allocated at the beginning of the program, and space is released at the end of the program. The default value is 0, which can be changed during use. Static variables or static functions can be accessed

How to layout the memory of C Programming programs In C, each variable and function has two attributes:Data TypeAndData storage category.Storage Class of local variables and global variables in C Language (static,extern,auto,register) 1. Partition

1. What is the definition of a variable? How do I check that a variable is defined? How do I delete a variable? How do I detect if a variable is set? $ defines whether the isset ()//check variable is setDefined ()//Detect constants are setUnset