The following storage class specifiers can be used
extern static auto register
When an object is declared, not only are the object's type and name defined but also its storage class.
The storage class specifies the lifetime of the object and its object scope.
Normally, an object is only available within a module, including the source file and header files.
You can define an object with:
| Scope block scope | Meaning The object is only available in the code block in which it was defined. |
|---|---|
| file scope | The object can be used within a single module. Only the functions within this module can reference the object. |
| program scope | The object is available throughout the program. These objects are often referred to as global. |