global variable definition

1, can local variables and global variable duplicate? A: Yes, the local will screen the overall situation. To use a global variable, you need to use the "::" Local variables can have the same name as global variables, and when referenced within a

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

Original blog, reprint please indicate the source--Zhou Xuewei http://www.cnblogs.com/zxouxuewei/Static is used in two ways: static in process-oriented programming and static in object-oriented programming. The former applies to ordinary variables

(1) compilation unit (module)Compile the code on VC or VS and click the compile button to generate the exe file. The Compiler performs two steps: Step 1: compile each. cpp (. c) and the corresponding. h file into an obj file;Step 2: link all the

Recently learning Lua, about LUA compiled place, because Lua is written in C, C language in C + + functions, need to use the extern "C" compile before, seemingly did not touch this knowledge, write a blog to commemorate, by the way the role of the

Can global variables be defined in header files that can be contained by multiple. c files? Why?Yes. The global variables with the same name are declared in static form in different C files. Variables and functions cannot be directly defined in the

In class_core.php, global $ _ G indicates the first time that a global variable is passed for the second time, instead of a global source: www. discuz. netforum. php? Modviewthread & amp; tid3007341 rating: global $ _ G meaning & nbsp; the first

Original: http://www.cnblogs.com/GavinDai/archive/2011/10/24/2222735.htmlWe are in the program design, always use the definition of variables and the declaration of variables, but sometimes we are not very clear about the concept, know how it is

What is a global variable? A global variable , also known as an external variable, is defined outside the function and is scoped to the end of the program file, starting at the definition of the variable. Unlike other programming languages, global

a local variable is a value stored in the entire class using the same memory Block. The existence of global variables is mainly due to the following reasons: 1, The use of global variables will occupy more memory (because of their lifetime), but in