#include <iostream>
#include <string.h>

using namespace std;

int sum(int a, int b) // pass by value
{
	return a+b;
}

int mySumRef(int &a, int &b) // pass by reference
{
	return a + b;
}

void myPtrRef(int *a, int *b) // pass by reference
{
	cout << "Sum is " << *a + *b << endl;
}

int* myIntReturn ( int a, int b) // returns a pointer
{
	return &a;
}


int main() {

  int *myA = new int;
  int *myB = new int;

  *myA = 5;
  *myB = 10;

  myPtrRef(myA, myB);
  int c = sum(*myA, *myB);
  cout << "c = " << c << endl;

  int aa=5, bb=10;

  int d = mySumRef(aa, bb);

  cout << "d = " << d << endl;
  cout << endl << endl << endl << endl;

	int i;    // holds a value
	int *ptr = NULL; // holds memory address

	i = 5;
	ptr = &i;

	cout << "i= " << &i << "  ptr= " << ptr << endl;
    *ptr = 10;
    cout << "i= " << i << "  ptr= " << *ptr << endl;

  //  int *AnotherInt = new int;

    int *AnotherInt;  // declaration
    AnotherInt = new int;  // initalization
    *AnotherInt = 5; // assign AnotherInt to store 5

    cout << "Addrss is= " << AnotherInt <<  "  *AnotherInt= " << *AnotherInt << endl;

    char myChars[5];

    myChars[0] = 'a';
    myChars[1] = 'b';

    char myChars2[5] = {'a'};
    float myFloats[10] = { 1 };
    int myInts[10];

    for (i=0; i<10; i++)
    {
    	 myInts[i] = i;
    }


    // ALL of these do the same thing
    // they all create "strings"

	char name[] = "Barbara";  // char array
	string names = "Barbara"; // string class
	char *others = "Hecker"; // c-string

	cout << "others= " << others << endl;

	cout << "myInts Address= " << myInts << endl;
	cout << "myInts Value= " << *myInts << endl;

	others = name;
	cout << "Other is now= " << others << endl;

	return 0;
}