What Is Void In C?


Author: Lorena
Published: 13 Nov 2021

Voids and their use

You need to reference the value in a void pointer in order to use it. You must know the type of value in order to dereference it. C's void pointers are a powerful technique, but they should be used carefully.

Voids in a Pointer Declaration

void is a function return type that indicates that the function does not return a value. When void appears in a declaration, it means that the pointer is universal. void indicates that the function takes no parameters.

The function that is void is just like the function that is value-returning is just like the function that is void. The void function returns control to the caller after it accomplishes its task. The void function call is not a statement of its own.

A pointer declaration is a third use of void and is useful for programmers who don't use pointers. It must be cast to another pointer before it is dereferenced. A void pointer is used to point to objects.

A General-Purpose Compiler Based on Pointers

The flow of the language follows a way that the type of pointer is followed by the name of the pointer which is being pointed and allocated as an address allocation. The Pointer declaration is performed with the name and type of the pointer. The same representation of pointer and character type can be found in C.

The pointer concept in C is useful in addressing and memory allocation. It helps in implementing void and generic pointers. It is sometimes called a general-purpose pointer.

Referencing and Dereferencing are important in pointer concept. The power of reusability for void pointers is the most important theme line of all the added advantage. It can store any type of object and can retrieve any type of object from the defined object using the indirection operator and operator.

The dereferencing operator can be used to access the stored data in the memory location for the pointer pointing the data type and it will have a direct impact on the value of the data type. The problem of pointers pointing to each other with different values and data types is mitigated by void pointers in C. There is a reduction in explicit typecasting.

Voids as Data Pointers

The pointer can point to any variable that is not declared with the const or volatile keyword if the type is void. Unless it's cast to another type, a void* pointer can't be dereferenced. A void* pointer can be used as a data pointer.

Void Pointers in C

A void pointer is a pointer that has no data type associated with it. It can point to a variable of any data type. There are void pointers in C.

std:sort and the failure to caller functions

std::sort is a function that takes a std object as a reference and sorts it in ascending order. One should always consider the failure to the caller functions when designing the solution because void functions don't have the means to communicate it.

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