What is a void pointer in C++?
void pointer in C / C++ A void pointer is a pointer that has no associated data type with it. A void pointer can hold address of any type and can be typcasted to any type. In C++, we must explicitly typecast return value of malloc to (int *).
How do you assign a void pointer in C++?
After declaration, we store the address of variable ‘data’ in a void pointer variable, i.e., ptr. Now, we want to assign the void pointer to integer pointer, in order to do this, we need to apply the cast operator, i.e., (int *) to the void pointer variable.
Why do we use void pointer in C++?
This is a special type of pointer available in C++ which represents absence of type. void pointers are pointers that point to a value that has no type (and thus also an undetermined length and undetermined dereferencing properties). This means that void pointers have great flexibility as it can point to any data type.
What is void in C++ with example?
Void as a Function Return Type The void function accomplishes its task and then returns control to the caller. The void function call is a stand-alone statement. For example, a function that prints a message doesn’t return a value. The code in C++ takes the form: void printmessage ( )
What is size of void pointer?
The size of void pointer varies system to system. If the system is 16-bit, size of void pointer is 2 bytes. If the system is 32-bit, size of void pointer is 4 bytes.
What is a void * pointer?
A void pointer is a pointer that has no associated data type with it. A void pointer can hold address of any type and can be typcasted to any type.
What is the void function in C++?
void (C++) When used as a function return type, the void keyword specifies that the function does not return a value. When used for a function’s parameter list, void specifies that the function takes no parameters. A void pointer can point to a function, but not to a class member in C++.
What is the size of void?
If the system is 32-bit, size of void pointer is 4 bytes. If the system is 64-bit, size of void pointer is 8 bytes.
Are all pointers the same size?
Generally yes, All pointers to anything, whether they point to a int or a long or a string or an array of strings or a function, point to a single memory address, which is the same size on a machine.