#include <iostream.h>

//#include <iostream>
//using namespace std;

void assigningThruPointer();
void pointingToVariables();
void partsOfVariables();
void arraysAndPointers();
void arrayIndicesAndPointerOffsets();
void overflowingArrays();
void assignment();

void assignment()
{
	int array[]={1,2,3,4,5,6};

	cout<<"assignment"<<endl;
	cout<<"array[3]: "<<array[3]<<endl;

	// array[3]=3;
	// Perform the equivalent of the above statement
	// without using either "array" or "[]" left of =

	cout<<"array[3]: "<<array[3]<<endl;
	cout<<endl;
}

void overflowingArrays()
{
	int beforeVar=-10;
	int array[]={1,2,3,4,5,6};
	int afterVar=10;
	int index;

	cout<<"overflowingArrays"<<endl;

	cout<<"Direct beforeVar value: "<<beforeVar<<endl;
	index=&beforeVar-array;
	cout<<"Index of beforeVar: "<<index<<endl;
	cout<<"Indirect beforeVar value: "<<array[index]<<endl;
	array[index]=-11;
	cout<<"Trashed beforeVar value: "<<array[index]<<endl;

	cout<<"Direct afterVar value: "<<afterVar<<endl;
	index=&afterVar-array;
	cout<<"Index of afterVar: "<<index<<endl;
	cout<<"Indirect afterVar value: "<<array[index]<<endl;
	array[index]=11;
	cout<<"Trashed afterVar value: "<<array[index]<<endl;

	cout<<endl;
}

void arrayIndicesAndPointerOffsets()
{
	int array[]={1,2,3,4,5,6};
	int *pArray=array;

	cout<<"arrayIndicesAndPointerOffsets"<<endl;
	cout<<"Address of zeroth element: "<</**/&array[0]<<endl;
	cout<<"Pointer value: "<<pArray<<endl;
	cout<<"Address of first element: "<</**/&array[1]<<endl;
	cout<<"Incremented pointer value: "<</**/pArray+1<<endl;
	cout<<endl;
}

void arraysAndPointers()
{
	int array[]={1,2,3,4,5,6};
	int *pArray=array;

	cout<<"arraysAndPointers"<<endl;
	cout<<"Value of array: "<<array<<endl;
	cout<<"Address of array: "<</**/pArray<<endl;
	cout<<endl;
}

void assigningThruPointer()
{
	int var=3,*var_ptr=&var;

	cout<<"assigningThruPointer"<<endl;
	cout<<"Value of var before: "<<var<<endl;

	/**/*var_ptr=4;

	cout<<"Value of var after: "<<var<<endl;
	cout<<endl;
}

void pointingToVariables()
{
	// type name value
	int var=3;
	int* pVar=&var;

	cout<<"pointingToVariables"<<endl;
	cout<<"Value of var: "<<var<<endl;
	cout<<"Address of var: "<<&var<<endl;

	cout<<"Value of pVar: "<<pVar<<endl;
	cout<<"Addressee of pVar: "<</**/*pVar<<endl;
	cout<<"Address of pVar: "<</**/&pVar<<endl;
	cout<<endl;
}

void partsOfVariables()
{
	// type name value
	int var=3;

	cout<<"partsOfVariables"<<endl;
	cout<<"Value of var: "<<var<<endl;
	// and address
	cout<<"Address of var: "<</**/&var<<endl;
	cout<<endl;
}

int main()
{
	partsOfVariables();
	pointingToVariables();
	assigningThruPointer();
	arraysAndPointers();
	arrayIndicesAndPointerOffsets();
	overflowingArrays();
	assignment();
	return 0;
}