Question

I am currently trying to create a bmi calculator and i am stuck with trying to get the feet and inches of a persons height into one value in inches as i do not know how to catch the two different values (feet and inches) and then verify them.

public class BMI {

public static void main (String[] args)
{
    System.out.println("Value between 2 and 7: " + heightInInches(2,7));
    System.out.println("Value between 0 and 11: " + heightInInches(0,11));

    System.out.println("Value between 3 and 30: " + weightInPounds(3,30));
    System.out.println("Value between 0 and 13: " + weightInPounds(0,13));
}

public static int heightInInches(int lower, int upper)
{
    Scanner kybd = new Scanner(System.in);
    System.out.printf("Enter your height between %d and %d: ", lower, upper);
    int height = kybd.nextInt();

    while (height < lower || height > upper)
    {
        System.out.printf("Retry between %d and %d:" , lower, upper);
        height = kybd.nextInt();
    }     

    return height;

}

Answer 1

The following is a simple BMI calculator, you could play around by amending your own conditions.

static int heightInInches( int f,int i){
            int in=f*12;
            int inches=i+in;
            return inches;
        }
        static int weightInPounds(int stone, int p){
            int po=stone*14;
            int pounds=p+po;
            return pounds;
        }
        static int calculateBMI(int height,int weight ){
            int w=weight*703;
            int h=height*height;
            int bmi = w/h;
            return bmi;
        }
        public static void main(String[] args){
            Scanner input=new Scanner(System.in);
            System.out.print("Enter height in feet (2-7): ");
            int feet=input.nextInt();
            while( !(feet>= 2 && feet<=7))
            {
                System.out.println("Retry between 2 and 7 :");
                feet=input.nextInt();
            }
            System.out.print("Enter height in inch(0-11): ");
            int inch=input.nextInt();
            while( !(inch>= 0 && inch<=11))
            {
                System.out.println("Retry between 0 and 11 :");
                inch=input.nextInt();
            }
            System.out.print("Enter weight in stone: ");
            int stone=input.nextInt();
            System.out.print("Enter weight in pound: ");
            int pound=input.nextInt();
            int height=heightInInches(feet,inch);
            int weight=weightInPounds(stone,pound);
            int bmi=calculateBMI(height,weight);
            System.out.println("BMI is: "+bmi);
        }