Random Thoughts.....What Are You Thinking?

//Purpose: to calculate fat calories and fat percentage
//Author: 
//Date: 2/21/2012
//Filename: intermediate17.cpp
//Input: totalCals, fatGrams
//Output: fatCals, fatPercent

#include <iostream>
#include <iomanip>

using namespace std;

//function prototypes
void getFatCals(int grams, int &fCals);
void getFatPercent(double fCals, double tCals, double &fPercent);

int main()
{
	//declare variables
	int totalCals = 0;
	int fatGrams = 0;
	int fatCals = 0;
	double fatPercent = 0;

	//enter input items
	cout << "Total Calories: ";
	cin >> totalCals;
	cout << "Grams of fat: ";
	cin >> fatGrams;

	//determine whether the data is valid
	if(totalCals >= 0 && fatGrams >= 0)
	{
		//calculate and display the output
		getFatCals(fatGrams, fatCals);
		getFatPercent(fatCals, totalCals, fatPercent);

		cout << "Fat calories: " << fatCals << endl;
		cout << fixed << setprecision(0);
		cout << "Fat percentage: " << fatPercent << "%" << endl;
	}
	else
	{
		cout << "Input error" << endl;
	} //endif

	return 0;
}//end of main function

//***Funtion Definitions***
void getFatcals(int grams, int &fCals)
{
	
	//calculate the fat calories
	fCals = grams * 9;

	
}//end getFatCals function

void getFatPercent(double fCals, double tCals, double &fPercent)
{
	//calculate the fat percent
	fPercent = fCals / tCals * 100;
}//end getFatPercent function