Tags Computer Programming C Programming C++ Programming

Animals & Plants Arts & Entertainment Auto Beauty & Health Books and Literature Business Electronics Engineering & Technology Food & Drink History Hobbies Jobs & Education Law & Government Math People & Society Science Social Studies Sports Travel & Places

Global variable in c

Anonymous

∙ 12y ago

Useable, but not recommended. Common example: errno

Wiki User

∙ 12y ago

Still curious? Ask our experts.

Chat with our AI personalities

Ross

Every question is just a happy little opportunity.

Chat with Ross

Beau

You're doing better than you think!

Chat with Beau

Vivi

Your ride-or-die bestie who's seen you through every high and low.

Chat with Vivi

Add your answer:

Earn +20 pts

Q: Global variable in c

Write your answer...

Submit

Still have questions?

What is Variable Scope?

The scope of a variable is the range, or area, in which a variable exists. // this c is global and can be referenced from anywhere int c = 1; void foo() { // this c is local to function foo and can't be referenced from the outside int c = 2; } void bar() { // if we try to reference c here, we get the value 1 from the global variable }

What are the value and preference of global variable?

Global variables can have any value, in C they are aumaticatically initialized to zero.

Is a global variable a non-local variable?

True, a variable cannot be both global and local. But if a global and a local variable share the same name, the local one will hide the global.

Which operator is allow to access hidden global variable in c plus plus?

A hidden global variable must be one that has its scope blocked by a local variable of the same name. To access the hidden variable, use the scope resolution operator ::, such as is ::variable_name. If there is another reason for the hidden status, please clarify and restate the question.

What is the difference between a static variable a global variable and a local variable?

A static variable is a variable allocated in static storage. A local variable is a variable declared inside a function. A global variable is a variable declared outside of any class or function. Note that local variables and global variables can both be allocated in static storage.

What is global variable in C programming?

A global variable is a variable that is declared at global scope, rather than file, namespace, function, class or nested scope. Global variables are usually declared with external linkage within a header and initialised in one (and only one) source file. Any file that includes the header (which includes the source file that initialised the global variable) then has unrestricted access to the variable. It is globally visible and any code can alter it. Global variables should be used sparingly and only when absolutely necessary. If the vast majority of the functions in your program require access to a particular variable, then a global variable makes perfect sense and is by far the simplest solution. However, a variable that is only used by a handful of functions can hardly be described as a global entity, thus it has no place within the global namespace and should be scoped to those functions that actually require it instead.

How can you declare global and local variable in pseudocode?

A local variable is a variable declared inside a construct, such as a class or function, while a global variable is a variable declared outside of any construct.

What happen if you declare a global variable as static in C language?

When declared as static, the variable has internal linkage and its scope is restricted to the *.c file in which it is declared. It becomes visible to all functions within the file where it is declared and not to functions in other files.

Why static variables in a function have global extent?

A variable declared static outside of a function has a scope the of the source file only. It is not a global variable. A variable declared outside of a function and without the static qualifier would be a global variable.

Member modifier 'public' must precede member type and name means in computer C language?

While you declaring the global variable you should declare it correctly... This problem mostly arise because any one of the data type in global should not have variable.

How do you hide local variables in c and give precedence to global variables inside the function?

Hi, I would like to answr the question.So, if you want the to give more precedence to global variables with respect to a local one.Just add a pair of curly braces in the local variable and by doing so u can access global variable.

What is the difference between a global variable and a private variable?

The accessibility. The global one: almost everywhere in the code may reference to the global variable directly. The private variable, is private to the declaring module (class, method, assembly) only. Outside of that module has no access to it directly.