Simple Cashier Program Source Code in Java

Now we are already in Day 2 in 30 day code challenge from hackerrank. This task will test you some uses of operators. As you know mathematic operations have to use several operator like “+” for sum, “-” for subtraction, “*” for multiplication, “/” for division, “%” for modulo operation, “( )” for do an operation which inside of it first, and so on.

In here, you will make a program like a cashier. Given a meal cost, tip percentage, and  tax percentage will be resulted a total amount of money customer must be paid. Image below show you how the program should be.

After understanding the algorithm of program, then here the solution :

import java.util.*;
import java.math.*;

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();
      
        // Write your calculation code here.
        double tip,tax, total;
        tip = mealCost * ((double)(tipPercent/100.0));
        tax = mealCost * ((double)(taxPercent/100.0));
        total = mealCost + tip + tax;
        // cast the result of the rounding operation to an int and save it as totalCost 
        int totalCost = (int) Math.round(total);
      
        // Print your result
        System.out.println("The total meal cost is "+totalCost+" dollars." );
    }
}

The result of listing program above after run is like this.

And here another input test :