null pointers and void pointers in C + +

Pointer null nullptr The problem of using 0 or NULL to express null pointers in the past:
The null macro for C/s + + is a macro that has many potential bugs. Because some libraries define them as integers 0, some are defined as (void*) 0. The Times in C are fine. But in the era of C + +, this can cause a lot of problems.
C++11 uses the NULLPTR keyword, which is a null pointer that expresses a more accurate, type-safe

#include <iostream>using namespace Std;int main () {//!void voidobject; wrong, cannot declare a variable of type void *pv;//pair, You can declare a pointer of type void int i = 5;PV = &i;//void type pointer to integer variable int *pint = Static_cast<int *> (PV); The void pointer is converted to an int pointer cout << *pint = "<< *pint << endl;return 0;}

null pointers and void pointers in C + +