Another important point you should keep in mind about void pointers is that – pointer arithmetic can not be performed in a void pointer. Example:- void *ptr; int a; ptr=&a; ptr++; // This statement is invalid and will result in an error because 'ptr' is a v...
Void pointers can point to any memory chunk. Hence the compiler does not know how many bytes to increment/decrement when we attempt pointer arithmetic on a void pointer. Therefore void pointers must be first typecast to a known type before they can be involved in any pointer arithmetic. void ...
making it suitable for pointing to any type of data. In other words, avoid pointercan point to an integer, a character, a string, or any other data type. This flexibility makes void pointers a powerful tool in C and C++ programming. ...
http://stackoverflow.com/questions/3523145/pointer-arithmetic-for-void-pointer-in-c When a pointer to a particular type (say int, char, float, ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, ...
Here, we will learnhow to pass a string (character pointer) in a function, where function argument is void pointer. Consider the given example #include<stdio.h>//function prototypevoidprintString(void*ptr);intmain(){char*str="Hi, there!";printString(str);return0;}//function definitionvoid...
when the function is not allowed to accept parameters, you must use the void limit,for example: int func(void) since void pointer can point to any type data, you can assign a void pointer to a any data type pointer,so you can also use the void pointer as a function paremeter, so th...
the pointer tovoidhad been offered in C/C++ language. It is one of the strength for programming. and it could be the basis of generic programming for C language also C++ does. For an example.if you want to creat a linked list, but the element type of the linked list cannot be decide...
Void and void pointer 1.概述 许多初学者对C/C++语言中的void及void指针类型不甚理解,因此在使用上出现了一些错误。本文将对void关键字的深刻含义进行解说,并详述void及void指针类型的使用方法与技巧。 2.void的含义 void的字面意思是“无类型”,void *则为“无类型指针”,void *可以指向任何类型的数据。
// is_void example #include <iostream> #include <type_traits> int main() { std::cout << std::boolalpha; std::cout << "is_void:" << std::endl; std::cout << "int: " << std::is_void<int>::value << std::endl; std::cout << "void: " << std::is_void<void>::value...
Again, void pointers can hold a pointer to a value of any type. For example, below is code that uses a void pointer to store the pointer to astruct studentreturned bycreate_student().This pointer is then assigned back into a variable of type struct student* in order to access the under...