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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.

Things You'll Need

  • Adult weight scale, in lbs.
  • Measuring tape
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Instructions

  1. C++ Code for Windows and Linux/Unix Platforms

    • 1

      Set up your C++ BMI code on Windows or Linux/Unix platforms.

    • 2

      Go to www.arachnoid.com to set up your C++ BMI code on Windows.

    • 3

      Go to www.arachnoid.com C++ tutorial page for C++ BMI code setup on Unix.

    • 4

      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

    • 5

      Take your weight in lbs. and enter it into the weight category box of the C++ BMI calculator.

    • 6

      Measure your height in inches and input it into the height box of the C++ BMI calculator.

    • 7

      Determine if your weight class is healthy, overweight or obese, based on the calculator output.

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