Question

You are tasked to provide a Fat Gram Calculator program for a local Weight Loss Center. The program should ask the user for the name of a food item, the number of calories and the number of fat grams in the item. The program should display the percentage of calories that come from fat. If the calories from fat are less than 30 percent of the total calories of the food, it should display a message indicating that the food is low in fat. If the percentage is equal to or higher than 30 percent the message should indicate that the food is high in fat.

One gram of fat has 9 calories, so
          calories from fat = fat grams * 9

The percentage of calories from fat can be calculated as
         Percent Fat = Calories from fat / total calories

Input validation: The program should make sure that the number of calories is greater than 0, the number of fat grams is 0 or more, and the number of calories from fat is not greater than the number of calories input.

Answer 1

code:

//import java util

import java.util.Scanner;

//define a class fat gram calculator

class Main

{

//main function

public static void main(String args[])

{

//scanner class

Scanner s=new Scanner(System.in);

//scanner class

Scanner t=new Scanner(System.in);

//while loop

while(true)

{

//print statement to enter disk name

System.out.print("Please enter the name of the dish: ");

//input thr string

String name=s.nextLine();

//print statement for fat

System.out.print("Enter the fat in grams: ");

//input the fat grams

double gm_ft=s.nextDouble();

//print statement for calories

System.out.print("Enter the calories: ");

//input the calories

double cal=s.nextDouble();

if(cal<0 || gm_ft<0 || cal>(gm_ft*9))

//print there is wrong value

System.out.println("error");

//calculation

double p=(gm_ft*9)/cal;

//print calories

System.out.println("The calories percentage = "+(p)+"%");

//if the percentage is less than 0.3

if(p<0.3)System.out.println("The food is low in fat");

//check to continue

System.out.print("Do you want to continue [* to quit]: ");

//onatin input

String F=t.nextLine();

if(F.charAt(0)=='*')break;

}

}

}