/***********************************************
 *                                             *
 *                                             *
 *              CSCI 1470, Fall 2005           *
 *              Machine Problem: MP8           *
 *     Purpose: Use functions to manipulate    *
 *                  two numbers                *
 ***********************************************/


#include <iostream>

using namespace std;


//Function prototypes
void get_data(double&, double&);

double max(double, double);

double min(double, double);

double total(double, double);

double avg(double, double);

void swap(double&, double&);


using namespace std;

int main(void)
{

	double a, b;

	get_data(a,b);
	
	cout << endl << "Maximum of the numbers is: " << max(a, b) << endl << endl;
	
	cout << "Minimum of the numbers is: " << min(a, b) << endl << endl;
	
	cout << "The sum of the two numbers is: " << total(a, b) << endl << endl;
	
	cout << "The average of the two numbers is: " << avg(a, b) << endl << endl;
	
	cout << "The given numbers are: " << a << " and " << b << endl << endl;
	
	swap(a, b);
	
	cout << "The numbers after swap function: " << a << " and " << b << endl << endl;


	return 0;


}//end of function main


//reads two real values from the keyboard with a prompt
void get_data(double& num_1, double& num_2)
{
	cout << "Enter the first number: ";
	cin >> num_1;

	cout << endl << "Enter the second number: ";
	cin >> num_2;
	
	return;
}//end of function get_data


//returns the largest of the two real values
double max(double num_1, double num_2)
{
	if (num_1 > num_2)
		return num_1;

	else
		return num_2;

}//end of function max


//returns the smallest of the two real values
double min(double num_1, double num_2)
{
	if (num_1 < num_2)
		return num_1;

	else
		return num_2;

}//end of function min


//returns the sum of the two real values
double total(double num_1, double num_2)
{
	return num_1 + num_2;

}//end of function total


//returns the average of the two real values
double avg (double num_1, double num_2)
{
	return total(num_1, num_2)/2;

}//end of function avg


//exchanges the two values
void swap(double& num_1, double& num_2)
{
	double temp = num_1;
	num_1 = num_2;
	num_2 = temp;
	
	return;

}//end of function swap