Java - Work with arithmetic operators

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Objective

In this challenge, you will work with arithmetic operators.

Task

Given the meal price, which is the base cost of a meal.

Tip percent, which is the percentage of the meal price being added as tip, and

tax percent, which is the percentage of the meal price being added as tax for a meal,

find and print the total cost of the meal.

Note

Be sure to use precise values for your calculations, or you may end up with an incorrectly rounded result!

Input Format

There are 3 lines of numeric input:

  • The first line has a double, mealCost (the cost of the meal before tax and tip).
  • The second line has an integer, tipPercent (the percentage of mealCost being added as tip).
  • The third line has an integer, taxPercent (the percentage of mealCost being added as tax).

Output Format

Print The total meal cost is totalCost dollars.

The total meal cost is totalCost dollars, where totalCost is the rounded integer result of the entire bill (mealCost with added tax and tip).

Sample Input 

12.00
20
8

Sample Output

The total meal cost is 15 dollars.

Explanation

Given: 

mealCost=12, tipPercent=20, taxPercent=8

Calculations:
tip = 12 x 20/100 = 2.4
tax = 12 x 8/100 = 0.96
totalCost = mealCost + tip + tax = 12 + 2.4 + 0.96 = 15.36
round(totalCost) = 15

We round totalCost to the nearest dollar (integer) and then print our result:

The total meal cost is 15 dollars.

Demo

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Arithmetic {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        double mealCost = scan.nextDouble(); // original meal price
        int tipPercent = scan.nextInt(); // tip percentage
        int taxPercent = scan.nextInt(); // tax percentage
        scan.close();//from w w w . j  a v a2s.co m
      
        // Write your calculation code here.
        // cast the result of the rounding operation to an int and save it as totalCost 
        int totalCost = (int) Math.round(mealCost + mealCost * tipPercent / 100.0 + mealCost * taxPercent / 100.0);
      
        // Print your result
        System.out.println("The total meal cost is " + totalCost + " dollars.");
    }
}

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