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...
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, ...
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 ...
Here, we will learn how to pass a string (character pointer) in a function, where function argument is void pointer.Consider the given example#include <stdio.h> //function prototype void printString(void *ptr); int main() { char *str="Hi, there!"; printString(str); return 0; } /...
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...
developer is that to return the address of the stack-allocatedvariablefrom thefunction. If you tried to access the returning address from the pointer, you will get an unpredictable result or might get the same value but it is very dangerous and need to avoid. Let’s see an example program...
Home » C » Pointer » Void Functions in C Next → ← Prev Void Functions in C By Dinesh Thakur Functions may be return type functions and non-return type functions. The non-return type functions do not return any value to the calling function; the type of such functions is void....
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。
int main() {/*from www.j a v a 2 s. com*/ void* vp; char c; int i; float f; double d; // The address of ANY type can be // assigned to a void pointer: vp = &c; vp = &i; vp = &f; vp = &d; } Previous Next...