#include using namespace std; int p1 = 15; int *ptr1; int main(void) { if(ptr1 == NULL) { cout << "\n Pointer is blank"; } cout << "\n what is p1 " << p1; cout << "\n address of &p1 " << &p1; // set ptr1 = &p1; if(ptr1 != NULL) { cout << "\n Pointer is lodaed"; cout << "\n ptr1 value is "<< *ptr1 << endl; } //delete ptr1; //ptr1 = NULL; cout << "------------\n"; if(ptr1 == NULL) { cout << "\n Pointer is lodaed"; cout << "\n ptr1 value is "<< *ptr1 << endl; } delete ptr1; // any reference to ptr1 will crash the programm return 0; }