BMI Metric and Imperial Calculator problems...

This is a discussion on BMI Metric and Imperial Calculator problems... within the C++ Programming forums, part of the General Programming Boards category; Hey everyone, i seem to be having a little bit of a problem with my coding for converting CM into ...

  1. #1
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    BMI Metric and Imperial Calculator problems...

    Hey everyone, i seem to be having a little bit of a problem with my coding for converting CM into inches, i get the answer no problem, but i then need to times the answer by itself to get the correct value but i'm unsure how to do so, here is my code.
    Code:
    /*
    * File: main.cpp
    * Author: 20524455
    *
    * Created on 01 December 2010, 08:59
    */
    
    #include <cstdlib>
    #include <iostream>
    #include <math.h>
    using namespace std;
    
    char gender;
    char height;
    int while_cnt = 0;
    char option1 ='y';
    int femcnt;
    int malecnt;
    int J=2.54;
    int underweight;
    int normalweight;
    int overweight;
    int obese;
    int underweightf;
    int normalweightf;
    int overweightf;
    int obesef;
    double Imperial;
    double Metric;
    char weight;
    double Imperial2;
    double Metric2;
    double choice1;
    double choice2;
    double BMI1;
    int I = 703;
    int main() {
    cout<<"Created and Designed by Rhys Thomas, 2010-2011"<<endl;
    cout<<"Male/Female: Body Mass Index Calculator"<<endl;
    cout<<"In both Metric and Imperial Calculations"<<endl<<endl<<endl;
    
    while (option1 == 'y')
    {
    cout<<"Please specify your Gender: (M/F)"<<endl;
    cin>>gender;
    
    
    if ((gender =='M')||(gender =='m') )
    {
    cout<<" "<<endl<<endl;
    cout<<"You have chosen Male"<<endl<<endl;
    malecnt = malecnt +1;
    
    
    }
    
    else if ((gender =='F')||(gender =='f') )
    {
    cout<<" "<<endl<<endl;
    cout<<"You have chosen Female"<<endl<<endl;
    femcnt= femcnt +1;
    
    }
    
    
    cout<<"Would you like your Height in Inches or Meteres? (I/M)"<<endl;
    cin>>height;
    cout<<" "<<endl<<endl;
    
    if ((height =='I')||(height =='i') )
    {
    cout<<"Please enter your Height in Inches: "<<endl;
    cin>>Imperial;
    Imperial= Imperial * Imperial;
    choice1=Imperial;
    cout<<" "<<endl<<endl;
    }
    
    else if ((height =='M')||(height =='m') )
    {
    cout<<"Please enter your Height in Cetremetres: "<<endl;
    cin>>Metric;
    cout<<" "<<endl<<endl;
    Metric= Metric / 2.54; <<<<<<<<PROBLEM CODE
    choice1=Metric;
    cout<<choice1;
    }
    
    cout<<"Would you like your Weight in Pounds or KG? (P/K)"<<endl;
    cin>>weight;
    cout<<" "<<endl<<endl;
    if ((weight =='P')||(weight =='p') )
    {
    cout<<"Please enter your Weight in Pounds: "<<endl;
    cin>>Imperial2;
    Imperial2= Imperial2 * I;
    cout<<Imperial2;
    choice2=Imperial2;
    BMI1= choice2 / choice1;
    cout<<BMI1;
    cout<<" "<<endl<<endl;
    cout<<"Your BMI is " <<BMI1<<endl<<endl;
    
    
    }
    
    else if ((weight =='K')||(weight =='k') )
    {
    cout<<"Please enter your Weight in KG: "<<endl;
    cin>>Metric2;
    choice2=Metric2 * 2.2 * I;
    BMI1= choice2 /choice1;
    cout<<BMI1;
    cout<<" "<<endl<<endl;
    cout<<"Your BMI is " <<BMI1<<endl<<endl;
    }
    
    if (BMI1 <=17.5)
    {
    cout<<"You are classed within the: Under-Weight Group"<<endl<<endl;
    
    if ((gender =='M')||(gender =='m') )
    {
    cout<<" "<<endl<<endl;
    underweight=underweight+1;
    cout<<"The current Male count for this group is :" <<underweight<<endl<<endl;
    }
    
    else if ((gender =='F')||(gender =='f') )
    {
    underweightf=underweightf+1;
    cout<<"The current Female count for this group is :" <<underweightf<<endl<<endl;
    }
    
    }
    
    if (BMI1 >=18)
    {
    cout<<"You are classed within the: Normal Weight Group"<<endl<<endl;
    
    if ((gender =='M')||(gender =='m') )
    {
    normalweight=normalweight+1;
    cout<<"The current Male count for this group is :" <<normalweight<<endl<<endl;
    }
    
    else if ((gender =='F')||(gender =='f') )
    {
    normalweightf=normalweightf+1;
    cout<<"The current Female count for this group is :" <<normalweightf<<endl<<endl;
    }
    
    }
    
    if (BMI1 >=25)
    {
    cout<<"You are classed within the: Over-Weight Group"<<endl<<endl;
    
    if ((gender =='M')||(gender =='m') )
    {
    overweight=overweight+1;
    cout<<"The current Male count for this group is :" <<overweight<<endl<<endl;
    }
    
    else if ((gender =='F')||(gender =='f') )
    {
    overweightf=overweightf+1;
    cout<<"The current Female count for this group is :" <<overweightf<<endl<<endl;
    }
    }
    if (BMI1 >=30)
    {
    cout<<"You are within the: Obese Group"<<endl<<endl;
    
    if ((gender =='M')||(gender =='m') )
    {
    obese=obese+1;
    cout<<"The current Male count for this group is :" <<obese<<endl<<endl;
    }
    
    else if ((gender =='F')||(gender =='f') )
    {
    obesef=obesef+1;
    cout<<"The current Female count for this group is :" <<obesef<<endl<<endl;
    }
    }
    
    while_cnt++;
    cout<<"do you wish to enter another BMI ? (y/n)"<<endl<<endl;
    cin>>option1;
    }
    cout<<"The total of each group is as followes: "<<endl<<endl;
    cout<<"Males Under-Weight: "<<underweight<<endl;
    cout<<"Female's Under-Weight " <<underweightf<<endl;
    cout<<"Males Normal-Weight: "<<normalweight<<endl;
    cout<<"Female's Normal-Weight " <<normalweightf<<endl;
    cout<<"Males Over-Weight: "<<overweight<<endl;
    cout<<"Female's Over-Weight " <<overweightf<<endl;
    cout<<"Males Obese: "<<obese<<endl;
    cout<<"Female's Obese: " <<obesef<<endl;
    cout<<"The total male count is: ";
    cout<<malecnt<<endl;
    cout<<"The total female count is: ";
    cout<<femcnt<<endl;
    return 0;
    
    }
    Last edited by TBsparky; 12-30-2010 at 02:27 PM.

  2. #2
    and the hat of wrongness Salem's Avatar
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    You could edit your post so that the code tags are around your code.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    I was highlighting the code that was the problem. I thought it would have been easier to see but Ok, i'll use the code tags.

  4. #4
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    Perhaps you can elaborate a bit more on your problem? I think this is the result you were looking for.

    Code:
    else if ((height =='M')||(height =='m') )
    {
    cout<<"Please enter your Height in Cetremetres: "<<endl;
    cin>>Metric;
    cout<<" "<<endl<<endl;
    Metric = (Metric / 2.54)*2; //PROBLEM CODE
    choice1 = Metric;
    cout << choice1 << "\n\n";
    }

  5. #5
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    That coding doesn't actually work it's giving me a whole different value lol.

    What i want to happen is when a user types a value e.g. 180 it will be coverted ino inches by ( / 2.54 = 70.8661) i wanted then to times 70.8661 by itself to get the correct BMI Height

  6. #6
    and the Hat of Guessing tabstop's Avatar
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    So why not leverage what you've already done?
    Code:
    Imperial = Metric / 2.54;
    Imperial = Imperial * Imperial;

  7. #7
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    Thank you! That worked perfectly, although I dont quite understand the coding. Does it use the Imperial * Imperial function for Inches and then the /2.54 in metres? I ask this as i will have to explain my code aswell.

  8. #8
    a_capitalist_story
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    Holy global variables Batman!

    Imperial is not a function...it's a variable! The only function in your completely unindented code (which is miserable to read) is main().

  9. #9
    and the Hat of Guessing tabstop's Avatar
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    Quote Originally Posted by TBsparky View Post
    Thank you! That worked perfectly, although I dont quite understand the coding. Does it use the Imperial * Imperial function for Inches and then the /2.54 in metres? I ask this as i will have to explain my code aswell.
    Dude, that's "your" code. I didn't write any of that. Why did you put it in the program if you don't know what it does?

  10. #10
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    Thank you for the clarification lol.... anyway, being a total newbie at C++ i wasn't too sure about the coding or the structure, i prefer VB but you really know how to make a guy want to learn code, i'm gunna be writing descriptions now my coding is complete.

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