functions -

synonyms
	routine
	process
	sub-routine
	sub
	method

goals
	reduce complexity
	remove redundent code (one place to fix a problem)
	document code "Say it in code"

2 categorys
	functions that give an answer - non-void functions
	functions that just do their job - void functions
	
parameters - the varibles in the () of a function, 
	they should dictate what the function does
	the parameters alreay have values, in is not required to ask the user for values within the function

void - the function does not return a answer

a function that returns a value can be treated a constant variable

nameing funcitons
	void - verb or verb noun combination
		print, print document, displaySum		
	non-void - noun or adjective-noun 
		sum, currentBalance, todaysDate
		name as you would a varible, describe the data
		

parameter
argument

Homework
write 2 functions
	one that returns the factorial of an integer
	one that displays the factorial of an integer

In main show that the funcitons work by calling them
Get a number from the user to pass to the functions


/////////////////////////////////////////////////////////////

#include<iostream>
#include<time.h>
using namespace std;



void displayTime()
{
	cout << "Time" << endl;
}

void dispayPower(int x, int y)
{
	int answer = 1;

	while(y > 0)
	{
		answer = answer * x;
		y--;
	}

	cout << answer << endl;
}

int power(int x, int y)
{
	int answer = 1;

	while(y > 0)
	{
		answer = answer * x;
		y--;
	}

	return answer;
}


int absoluteValue( int number )
{
	int result = number;

	if(result < 0)
	{
		result *= -1;
	}

	return result;
}

void displayAbsoluteValue(int number)
{
	cout << absoluteValue(number) << endl;
}

void main()
{
	dispayPower(7,3);

	int p = power(7,3);
	//power(5,9) = 2; this is wrong
	cout << "the value that was returned is "  << p << endl;

	int x;
	cin >> x;
	cout << absoluteValue(x) << endl;


	//cout << "Start" << endl;
	//displayTime();	
	//cout << "Stop" << endl;

}