program print the address and value using pointer (POP) (158)

#include<iostream>

using namespace std;

int main()

{

int a=100;

int* ptr1;

int** ptr2;

ptr1=&a;

ptr2=&ptr1;

cout<<"the address of a="<<&a<<endl; //in this we find the address of a

cout<<"the address of a="<<ptr1<<endl; //in this we store the addsress of a in ptr1

cout<<"the address of ptr1="<<ptr2<<endl; //in this we store the address of ptr1 in ptr2

cout<<"the value of a="<<*ptr1<<endl; //in this we display the value of a by pointer ptr1

cout<<"the value of a="<<**ptr2<<endl; //in this we display the value of a by pointer ptr2

cout<<"the vaue of a="<<a<<endl; 

}