A good answer might be:

Let us use integer values for input and use double precision for the calculation and the result. (It would be OK to use integers for everything.)

The application part of the new program will look much like the previous example, except that now there are two values input from the user. This will not much affect the application, but will later on affect the GUI.

public class percentFat { int calories ; // input from the user: total calories per serving int fatGrams ; // input from the user: grams of fat per serving double percent ; // result: percent of calories from fat percentFat() // constructor { . . . . . } // The application public void calcPercent( ) { percent = ( (fatGrams * 9.0) / calories ) * 100.0 ; } // GUI code . . . . . public static void main ( String[] args ) { percentFat fatApp = new percentFat() ; . . . . . } }

As with fahrConvert you could add a few lines of code to make this a non-GUI application (sometimes called a ASCII terminal application.)

QUESTION 9:

Would the calculation

percent = ( (fatGrams * 9) / calories ) * 100 ;