// File: ArrayDebug.cpp
// Driver for Array ADT. 
// Debugging Demo - show how r-value is created, and some examples
//	to distinguish r-values and l-values, along with constructor use
//	in the debugger

#include <iostream>
#include "Array.h"

int const ELTS=4;

// Change argument to & to see change in debugging
int doubleVal(int a)
{	return(a*2);
}

// What's the big omission here?
void add1(Array a)
{for (int i=0;i<a.getSize();i++)
	a[i]=a[i]+1;
}

// Passing the object by reference. 
void add2(Array &a)
{for (int i=0;i<a.getSize();i++)
	a[i]=a[i]+2;
}

// Try exchanging headers. Why doesn't it compile? Hard!
Array add3(Array a)
// Array add3(const Array &a)
{for (int i=0;i<a.getSize();i++)
	a[i]=a[i]+3;
 return(a);
}

int main()
{Array one(ELTS);
 for (int i=0;i<ELTS;i++)
   one[i]=i;
 cout << "One:" << one;
 Array two=one;
 two[0]=doubleVal(two[ELTS-1]);
 two[0]=43;
 two[2]=56;
 cout << "Two:" << two;
 Array three(one);
 three=two;
 add1(one);
 cout << "One:" << one;
 add2(two);
 two=add3(three);
 cout << "Two:" << two;
 one=three=two;
 return(0);
}