gistfile1.cpp

#include <iostream>
#include <iomanip>

using namespace std;

//This function needs floating point promotion to have a working division
//This way we don't lose precision in the division.
double getBMI(double h, double w, double s)
{
    return (w / (h*h)) * s;
}

//Output the BMI of the person
void output(double b)
{
    cout << setprecision(2) << fixed << "Your BMI is " << b << endl << endl;
}

//Our main program
int main()
{
    int height1, height2, weight1, weight2;
    double bmi1, bmi2;
    double scalar = 703.0;

    //First person
    cout << "Person 1 height: ";
    cin >> height1;
    cout << "Person 1 weight: ";
    cin >> weight1;
    bmi1 = getBMI(height1, weight1, scalar);
    output(bmi1);

    //Second person
    cout << "Person 2 height: ";
    cin >> height2;
    cout << "Person 2 weight: ";
    cin >> weight2;
    bmi2 = getBMI(height2, weight2, scalar);
    output(bmi2);

    return 0;
}