Types of Storage Class Specifiers in C:
| Storage Specifier | Description |
| auto | Storage place: CPU Memory Initial/defaul ... |
| extern | Storage place: CPU memory Initial/defaul ... |
| static | Storage place: CPU memory Initial/defaul ... |
| register | Storage place: Register memory Initial/d ... |
What is a storage class in C?
A storage class defines the scope (visibility) and life-time of variables and/or functions within a C Program. They precede the type that they modify. We have four different storage classes in a C program − auto; register; static; extern; The auto Storage Class. The auto storage class is the default storage class for all local variables.
How many storage class specifiers are available in C language?
There are 4 storage class specifiers available in C language. They are, auto. extern. static. register.
What to do if no storage class specifier is specified?
If no storage class specifier is specified then following rules are used: Variables declared inside a function are taken to be auto. Functions declared within a function are taken to be extern.
How many storage class specifiers can be given in a declaration?
At most one storage class specifier may be given in a declaration. If no storage class specifier is specified then following rules are used: Variables declared inside a function are taken to be auto. Functions declared within a function are taken to be extern.
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How many storage class specifiers are there in C?
There are 4 storage class specifiers available in C language. They are,
What is storage class in C?
Storage class specifiers in C language tells the compiler where to store a variable, how to store the variable, what is the initial value of the variable and life time of the variable.
Why is it better to use register specifiers or auto specifiers?
Because, register variables are stored in register memory whereas auto variables are stored in main CPU memory. Only few variables can be stored in register memory.
What is static variable?
Static variables retain the value of the variable between different function calls.
Where is the scope of an extern variable?
The scope of this extern variable is throughout the main program. It is equivalent to global variable. Definition for extern variable might be anywhere in the C program.
Can variables be stored in register memory?
Only few variables can be stored in register memory. So, we can use variables as register that are used very often in a C program.
What is a C storage class specifier?
C storage class specifiers determines the physical location in memory within the computer where the variable declared in c would be actually stored.
What is the difference between register storage class specifier and auto storage class specifier?
The variables declared using register storage class specifier are treated similarly like that defined by auto storage class specifier with the only difference is that the variables are stored within the CPU registers providing faster access.
What is the garbage value in C?
The variables declared in c using auto storage class are initialized with an unpredictable initial value often called as garbage value and can be accessed from anywhere within the block in which the variable is declared. As soon as the program control exits from the block in which it is defined, the variable is destroyed.
Where are variables stored in a program?
The variable declared using extern storage class are stored in memory with by default zero initial value and continue to stay within the memory until the program’s execution is not terminated.
Do static storage classes get destroyed?
However, the variables declared with static storage class are not destroyed even after program control exits from the block. Thus, the value of the variable persists between different function calls.
