#include<iostream>
using namespace std;

int main()
{
    int a = 10;
    int* iptr;
    
    cout <<" &a = " << &a << endl;
    iptr = &a;
    
    cout << "*iptr = " << *iptr << endl;
    *iptr = 20;
    
    cout <<" a = " << a <<endl;
    
    
    system("pause");
    return 0;
}//end main