#include <iostream>

using namespace std;

struct SimpleT{
    int one;
    string two;
};

class SecondT{
   public:
     SecondT() {
        number = 3;
	word = "hello";
     }

     int Number(void) const { return number;}
     string Word(void) const { return word;}

     void Number(int n) { number = n; return;}
     void Word(string w) { word = w; return ;}

   private:
     int number;
     string word;
};


int main() {
    int a =7;

    cout << "A pointer to a is " << & a << endl;

    // out of order don't do this but for discussion.
    int * pointerToA  = 0;
    int * secondPtrToA = NULL;
    int * thirdPtrToA = nullptr;

    pointerToA = & a;
    secondPtrToA = pointerToA;
    thirdPtrToA = pointerToA;

    cout << " pointerToA = " << pointerToA << endl;
    cout << " secondPtrToA = " << secondPtrToA << endl;
    cout << " thirdPtrToA = " << thirdPtrToA << endl;

    cout << endl << endl;

    cout << "*pointerToA = " << *pointerToA << endl;
    cout << "a = " << a << endl;

    *pointerToA = 99;

    cout << endl;
    cout << " after *pointerToA = 99; " << endl;
    cout << "*pointerToA = " << *pointerToA << endl;
    cout << "a = " << a << endl;

    cout << endl << endl;

    // out of order don't do this but for discussion.
    SimpleT s1;
    SimpleT *s1Ptr = nullptr;

    s1.one = 9;
    s1.two = "Hello World";

    s1Ptr = & s1;
    cout << "The name is " << s1Ptr->two << endl;
    cout << "The number is " << s1Ptr->one << endl;

    s1Ptr->one = 99;
    s1Ptr->two = "This is changed ";

    cout << "Indirect: The name is " << s1Ptr->two << endl;
    cout << "Direct: The name is " << s1.two << endl;
    cout << "Indirect: The number is " << s1Ptr->one << endl;
    cout << "Direct: The number is " << s1.one << endl;

    cout << endl;

    SecondT c1, * c1Ptr;
    c1Ptr = &c1;

    cout << c1Ptr->Word() << endl;
    c1Ptr ->Word("changed value " );
    cout << c1Ptr->Word() << endl;

    return 0;
}