point.comC++ Pointer to Pointer
- The pointer is known as a variable containing the address of another variable.
- The pointer variables also have an address.
- The pointer variable containing the address of another pointer variables is called a pointer to pointer.
- This chain can be continued to an extent.
Syntax:
int **p2; //Pointer to Pointer
Example:-
#include <iostream>
using namespace std;
int main()
{
int x=20;
int *p1,**p2;
p1=&x; /* x address store in p1 pointer variable */
p2=&p1; /* double pointer */
cout << "Address of x variable is " << &x << endl;
cout << "Address of p1 variable is " << p1 << endl;
cout << "Address of p2 variable is " << p2 << endl;
cout << "Value of *p1 variable is " << *p1 << endl;
cout << "Value of **p2 variable is " << **p2 << endl;
return 0;
}
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