Are you fat?

Use my BMI calculator to find out your BMI, then google for average BMI..


Code: [Select]
#include <iostream>
#include <cmath>
using namespace std;

int main()
{

const int VOOB = 12;
const float ZOOZ = 0.0254;
const float MOON = 2.2;

cout << "HELLO. Welcome to the Body Mass Index calculator!\n\n";
cout << "I will calculate your Body Mass Index.\n\n";
cout << "I HOPE YOU'VE BEEN GOOD!\n\n\n\n\n\n";

cout << "Round down your height to the nearest \"foot\",\n";
cout << "and type it on the line:____\b\b\b\b";

float var1;
cin >> var1;
float A = var1;

cout << "Thankyou. Now ENTER any remaining inches of your height,\n";
cout << "to the nearest inche:____\b\b\b\b";

float var2;
cin >> var2;
float B = var2;

cout << "Thankyou. Now enter your weight in pounds:____\b\b\b\b";

float var3;
cin >> var3;
float C = var3;

float TOTAL_HEIGHT_INCHES = A * VOOB + B;

float HEIGHT_IN_METERS = TOTAL_HEIGHT_INCHES * ZOOZ;

float TOTAL_MASS_in_KILOs = C / MOON;

float SQUARE_OF_TOTAL_mass = pow(HEIGHT_IN_METERS, 2);

float Z = TOTAL_MASS_in_KILOs / SQUARE_OF_TOTAL_mass;

cout << "Your BMI is: " << Z << "\n";

return 0;
}


If you don't want to compile it, download the .exe file here.

It's c++, btwMy BMI is 20. <3
Good job on the app.excellent job EEVIAC, and thanks for giving me and idea for a small easy project to practice my C# a little.

Here's an equivalent program made in C#. I probably could have made the weight input loop without cheating and using a try...catch, but hey, it works. probably a few other little things could be optimized, but oh well.

A NICE little "perk" I added was the height entry- it allows you to enter it directly as something like 6' 7" which I think is pretty neat.



Code: [Select]using System;


namespace bmi
{
class Program
{
static void Main(string[] args)
{
String gHeight;
String gFeet, gInch;
double Height=0, Weight=0;

Console.WriteLine("C# Body Mass Index Calculator");

Console.Write("Enter Your height (example: 4'3\",6'3\", etc):");
gHeight = Console.ReadLine();
int quotepos = gHeight.IndexOf("'");
int dquotepos = gHeight.IndexOf("\"");
gFeet = gHeight.Substring(0,quotepos);
gInch=gHeight.Substring(quotepos+1,dquotepos-quotepos);
gInch = gInch.Substring(0, gInch.Length - 1);


bool erroccured = true;
while (erroccured)
{
try
{
Console.Write("Enter your weight in Pounds:");
Weight = double.Parse(Console.ReadLine());
erroccured = false;
}
catch (Exception ex)
{
erroccured = true;
}
}

Height = double.Parse((gFeet))*12 + double.Parse(gInch);
Console.WriteLine("Entered amount is {0} feet {1} Inches>",gFeet,gInch);


Console.WriteLine("Calculated Body mass Index is {0}",bmi(Height,Weight).ToString());



Console.ReadKey();


}
private static double bmi(double height, double weight)
{
//BMI = Weight(lb) / (Height(in) x Height(in)) x 703
return weight / (height * height) * 703;



}
}
}
Don't forget the metric system!

My optimisation comments on that are:

- Try catching NumberFormat exception first, etc. up to Exception, the most general one.
What kind of exceptions could possibly occur?Quote from: Treval on February 28, 2010, 11:38:40 PM

- Try catching NumberFormat exception first, etc. up to Exception, the most general one.
What kind of exceptions could possibly occur?

Note the data types I used... You can enter a pretty big number, up to 64 bit (unsigned long long) in inches and get an exact output in FT , with exact number in inches on the side... Of course you could just enter a number in inches and convert it to a decimal number in FT, but I wanted something that would display the inches on the side..

As far as the double types (in the INCHES to FT/inches converter) , I should have used just "double" instead of long double to be more efficient in saving memory being used.... Long double wouldn't make any difference anyway, becuase of the long long bottleneck, so to speak..

Really it makes more sense to allow feet'Inches" to be input, and then parse those out of the string.

yes that does make more sense, I don't think I've read about parsing yet, so I'm not sure how to do it.. I'm sure I'll get there, though