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Fat Percentage

by: bs0d

Description:

A program written in Visual C++, uses a vod function to calculate percentage of fat by entered calories and grams.

Code:

//Displays fat calories and fat percentage

#include <iostream>
using namespace std;

//function prototype
void calcFatInfo(int, int, int &, float &);

int main()
{
	int totalCal          = 0;
	int fatGrams        = 0;
	int fatCal             = 0;
	float fatPercent = 0.0;

//enter input data
	cout << "Total calories: ";
	cin >> totalCal;
	cout << "Grams of fat: ";
	cin >> fatGrams;

//validate input data
	if (totalCal >= 0 && fatGrams >= 0)
	{
		//validate data
		calcFatInfo(totalCal, fatGrams, fatCal, fatPercent);
		cout << fixed;
		cout.precision(0);
		cout << "Fat calories: " << fatCal << endl;
		cout << "Fat percentage: " << fatPercent << "%" << endl;
	} else //invalid data
		cout << "Input error" << endl;
	//end if
	
	return 0;
}   //end of main function

//*****program-defined functions*****
void calcFatInfo(int tCal, int grams, int &fCal, float &fPer)
{
	//calculate fat calories and fat percentage
	fCal = grams * 9;
	fPer = float(fCal) / float(tCal) * 100;
}   //end of calcFatInfo function

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