How to Calculate Your BMI Using C Code
If you are passionate about health and technology, you may be interested in calculating your body mass index (BMI) using C code. BMI is calculated using your height-to-weight ratio and sometimes takes into consideration your age and sex. According to the Weight-control Information Network, a high BMI may put you at greater risk for certain types of cancer, coronary heart disease, gallbladder disease, osteoarthritis, and pregnancy complications. A BMI of 18.5 to 24.9 is considered healthiest, while a BMI of 25 to 29.9 and 30 or higher are considered overweight and obese, respectively.
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Instructions
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C++ Code for Windows and Linux/Unix Platforms
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1
Set up your C++ BMI code on Windows or Linux/Unix platforms.
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2
Go to www.arachnoid.com to set up your C++ BMI code on Windows.
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3
Go to www.arachnoid.com C++ tutorial page for C++ BMI code setup on Unix.
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Execute code lines 1 to 59 as follows onto the appropriate platform:
01 using System;
02 using System.Collections.Generic;
03 using System.ComponentModel;
04 using System.Data;
05 using System.Drawing;
06 using System.Linq;
07 using System.Text;
08 using System.Windows.Forms;
09
10 namespace BMIApp
11 {
12 public partial class Form1 : Form
13 {
14 public Form1()
15 {
16 InitializeComponent();
17 }
18
19 private void btnCalculate_Click(object sender, EventArgs e)
20 {
21 double weght = string.IsNullOrEmpty(txtWeight.Text) ? 1 : double.Parse(txtWeight.Text);
22 double height = string.IsNullOrEmpty(txtHeight.Text) ? 1 : double.Parse(txtHeight.Text);
23
24 if (weght == 0)
25 {
26 MessageBox.Show("Results will be inaccurate. Weight is not a valid number.");
27 }
28 if (height == 0)
29 {
30 MessageBox.Show("Results will be inaccurate. Height is not a valid number.");
31 }
32
33 double vmult = cboWeightUnits.SelectedItem.ToString() == "pounds" ? 2.204 : 1;
34 double hmult = cboHeightUnits.SelectedItem.ToString() == "inches" ? 0.0254 : 1;
35
36 double BMI = Math.Round(((weght / vmult) / ((height * hmult) * (height * hmult))) * 10) / 10;
37
38
39 string BMI_description = string.Empty;
40 if (BMI < 16.5)
41 BMI_description = "severely underweight";
42 else if (BMI >= 16.5 && BMI < 18.5)
43 BMI_description = "underweight";
44 else if (BMI >= 18.5 && BMI < 25)
45 BMI_description = "normal";
46 else if (BMI >= 25 && BMI <= 30)
47 BMI_description = "overweight";
48 else if (BMI > 30 && BMI <= 35)
49 BMI_description = "obese";
50 else if (BMI > 35 && BMI <= 40)
51 BMI_description = "clinically obese";
52 else
53 BMI_description = "morbidly obese";
54
55
56 txtResult.Text = string.Format("Your Body Mass Index (BMI) is: {0}. This would be considered {1}.", BMI, BMI_description);
57 }
58 }
59 }
Find Your BMI
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Take your weight in lbs. and enter it into the weight category box of the C++ BMI calculator.
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Measure your height in inches and input it into the height box of the C++ BMI calculator.
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Determine if your weight class is healthy, overweight or obese, based on the calculator output.
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Tips & Warnings
Please see the Resources section for additional BMI calculators and further information related to body mass index.
This article is for educational purposes only and not intended to diagnose, treat or cure any condition.
References
Resources
- National Heart Lung and Blood Institute: Calculate Your Body Mass Index
- BMICalculatorforFemales.com: BMI Calculator for Females
- Centers for Disease Control and Prevention: BMI Percentile Calculator for Child and Teen
- Centers for Disease Control and Prevention: The Health Effects of Overweight and Obesity
- Photo Credit calculator image by Randy McKown from Fotolia.com
