Question

///////////////////////////////////////////////////////////////////////////////////
//This program 
// 1. asks the user her/his weight and height
// 2. then calculates the user's body-mass-index (BMI) 
// 3. and then prints an appropriate message based on the user's BMI
///////////////////////////////////////////////////////////////////////////////////

#include <iostream>
using namespace std;

void printWelcome();

// ask the weight (in pounds) and height (in inches) of the user and store the values in formal
// parameters weight and height, respectively
void getWeightAndHeight(float& weight, float& height);

// calculate and return the BMI (Body-Mass-Index) based on the user's weight and height
float calculateBMI(float weight, float height);

// print a message to the user based on the user's BMI passed by the formal
// parameter bmi. 
// -------------------------------------------------------------------------
// Use the following BMI Categories to print an appropriate message to the user
// -----------------------------------------------------------------------
// Underweight if BMI =<18.5
// Normal weight if BMI is between 18.5 and 24.9
//      Overweight if BMI is between 25 and 29.9
// Obesity  if BMI of 30 or greater
void printReport(float bmi);

int main()
{
        float  w, h;

        // 0. Welcome
        printWelcome();

        ///////////////////////////////////////////////////////////////////////
        // TO-DO: 
        // - Complete the main program by calling the appropriate functions
        // appropriately
        // - Note that you must also complete the body of the functions below
        ///////////////////////////////////////////////////////////////////////

        // 1. ask the user her/his weight and height: call the getWeightAndHeight() function
        getWeightAndHeight(w, h);

        // 2. calculate the user's body-mass-index (BMI): call the calculateBMI() function 
        // ...

        // 3. print an appropriate message based on the user's BMI: call printReport() function
        // ...



        system("pause");
        return 0;
}

void printWelcome() {
        cout << "___________________________________________________________________________\n"
                << "This program \n"
                << " 1. asks the user her/his weight and height \n"
                << " 2. then calculates the user's body-mass-index (BMI) \n"
                << " 3. and then prints an appropriate message based on the user's BMI \n"
                << "___________________________________________________________________________\n\n";

}

// ask the weight (in pounds) and height (in feet) of the user and store the values in formal
// parameters weight and height, respectively
void getWeightAndHeight(float& weight, float& height) {
        // complete the body of this function
        //...
}

// calculate and return the BMI (Body-Mass-Index) based on 
// the user's weight (in pounds) and height (in inches)
// reference: http://extoxnet.orst.edu/faqs/dietcancer/web2/twohowto.html
float calculateBMI(float weight, float height) {
        // complete the body of this function
        //...
        return 0.0; // also fix this line
}

// print a message to the user based on the user's BMI passed by the formal
// parameter bmi. 
// -------------------------------------------------------------------------
// Use the following BMI Categories to print an appropriate message to the user
// -----------------------------------------------------------------------
// Underweight if BMI =<18.5
// Normal weight if BMI is between 18.5 and 24.9
//      Overweight if BMI is between 25 and 29.9
// Obesity  if BMI of 30 or greater
void printReport(float bmi) {
        // complete the body of this function
        //...

}

Answer 1

#include<iostream>
#include<cmath>

using namespace std;

float weight, height, BMI; //global declaration of weight, height and BMI variables. since we are using these varaibles throughout program, i have declared as global

//This method Prints Welcome Message to user
void printWelcome(){
cout << "___________________________________________________________________________\n"
<< "This program \n"
<< " 1. asks the user her/his weight and height \n"
<< " 2. then calculates the user's body-mass-index (BMI) \n"
<< " 3. and then prints an appropriate message based on the user's BMI \n"
<< "___________________________________________________________________________\n\n";
}

//This method takes inputs from user i.e weight and height and stores in weight and height variables respectively
void getWeightAndHeight() {
cout << "\n++++++++++++++++++++++++++++++++++++\n"
<< " Body Mass Index"
<< "\n++++++++++++++++++++++++++++++++++++\n";

cout << "Enter your weight (in pounds): ";
cin >> weight;
cout << "\nEnter your height (in inches): ";
cin >> height;

  
}

// This methid calculates BMI ased on weight and height given by user
float calculateBMI(float w, float h){
float weightAfterMetricConversion = (w*0.45); //weight Metric conversion as per URL given in the question
float heightAfterMetricConversion = (h*0.025); //height Metric conversion as per URL given in the question
float bmi = (weightAfterMetricConversion) / (heightAfterMetricConversion * heightAfterMetricConversion); //calculating BMI
return bmi;
}

//This method prints final report based on various conditions for BMI
void printReport(float bmi){
if(bmi <= 18.5)
cout << "Underweight\n\n";
if(bmi > 18.5 && bmi <= 24.9)
cout << "Normal Weight\n\n";
if(bmi > 25 && bmi <=29.9)
cout << "Overweight\n\n";
if(bmi > 30)
cout << "Obesity\n\n";
  
}

int main()
{
printWelcome(); //calling printWelcome method
getWeightAndHeight(); //calling getWeightAndHeight method
float BMI = calculateBMI(weight, height); // calling calculateBMI method and storing return value in BMI variable
printReport(BMI); //calling printReport method

system("pause");

return 0;
}

Sample Input and Output :

This program 1. asks the user her/his weight and height 2. then calculates the user 's body-mass-index (BMI) 3. and then prints an appropriate message based on the user' BMI Body Mass Index Enter your weight (in pounds): 125 Enter your height (in inches): 63 Normal Weight

Program snapshot :

#1 nclude<\ostream> #1 ncl ude<cmath> using namespace std; float weight, height, EMI; //global declaration of weight, height and BMI variables. since we are using these varaibles throughout program, i have declared as global /This method Prints welcome Message to user void printwelcomeOt cout << << This progr am \n <<1. asks the user her/his weight and height n" <<"2. then calculates the user's body-mass-index (BMI) n" <<3. and then prints an appropriate message based on the user 's EMI n" n\n" //This method takes inputs from user i.e weight and height and stores in weight and height variables respectively void getweightAndHeighto Body Mass Index t\n"; cout << "Enter your weight Cin pounds):; cin >> weight; cout << "nEnter your height (in inches):" cin >> height This methid calculates BMI ased on weight and height given by user rloat calculateBMICTloat W, rloat h) float weightAfterMetricconversion- CW"0.45); //weight Metric conversion as per URL given in the question float heightAfterMetricconversion-(ho.025)//height Metric conversion as per URL given in the question float bmi-(weightAfterMetricconversion)/CheightAfterMetricconversionheightAfterMetricconversion) //calculating BMI return bm; /This method prints final report based on various conditions for BMI void pr intReportcrloat bm) if (bmi 18.5) cout << "Underweight\nn" if Cbmi > 18.5 bmi24.9) cout << "Normal weight n\n" if (bmi >25 && bmi <-29.9) cout << "Overweight\n\n" if Cbmi >30) cout << "Obesit n\n" int mainO printwelcome ; //cal1ing printwelcome method getweightAndHeighto //calling getweightAndHeight method float BMIcalculateBMI(weight, height); / calling calculateBMI method and storing return value in ENI variable printReport (EMI) /calling printReport method system("pause: return o;