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In the predecessors of C, including BCPL and B, there was already a concept of static storage., [1] [2] which meant a storage which is always in existence. However, In B, there wasn't a static keyword, but there was an extrn keyword to specify external storage (external to all functions and must be defined outside a function), which is always static, in contrast with auto keyword, which ...
Static libraries can be easily created in C or in C++. These two languages provide storage-class specifiers for indicating external or internal linkage, in addition to providing other features. To create such a library, the exported functions/procedures and other objects variables must be specified for external linkage (i.e. by not using the C ...
The static keyword (static and extern are mutually exclusive), applied to the definition of an external variable, changes this a bit: the variable can only be accessed by the functions in the same module where it was defined. But it is possible for a function in the same module to pass a reference (pointer) of the variable to another function ...
In C, most compilers also mangle static functions and variables (and in C++ functions and variables declared static or put in the anonymous namespace) in translation units using the same mangling rules as for their non-static versions. If functions with the same name (and parameters for C++) are also defined and used in different translation ...
In computer programming, a static variable is a variable that has been allocated "statically", meaning that its lifetime (or "extent") is the entire run of the program. This is in contrast to shorter-lived automatic variables, whose storage is stack allocated and deallocated on the call stack; and in contrast to dynamically allocated objects, whose storage is allocated and deallocated in heap ...
Static inline functions behave identically in C and C++. Both C99 and C++ have a Boolean type bool with constants true and false, but they are defined differently. In C++, bool is a built-in type and a reserved keyword. In C99, a new keyword, _Bool, is introduced as the new Boolean type.
The term local variable is usually synonymous with automatic variable, since these are the same thing in many programming languages, but local is more general – most local variables are automatic local variables, but static local variables also exist, notably in C. For a static local variable, the allocation is static (the lifetime is the ...
In C/C++, a function declaration reflects its use; for example, a function pointer with the signature ... static indicates that the main method is a class method.