Homework Soursepackage moonweight import javautilScanner public class MoonW
package moonweight;
import java.util.Scanner;
public class MoonWeight {
/*
Program to calculate weight on earth
to weight on moon.
*/
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
double earthWeight; //weight on earth
double moonWeight; //weight on moon
System.out.print(\"Enter your weight in pounds: \");
earthWeight = input.nextDouble();
if (earthWeight <= 0.0)
{
System.out.print(\"Please enter a positive number. \");
earthWeight = input.nextDouble();
}
moonWeight = earthWeight * 0.17;
System.out.println(earthWeight + \" earth pounds is equal to \" +
moonWeight + \" moon pounds.\");
}
}
Tax rate Calculator:
package taxcalculator;
import java.util.*;
public class TaxCalculator {
public static void main(String[] args) {
System.out.print(\"Enter the Single Filers Income: \");
Scanner input = new Scanner(System.in);
double income = input.nextDouble();
double tax;
if(income <= 6000)
tax = income * .1;
else if(income <= 27950)
tax = income * .15;
else if(income <= 67700)
tax = income * .27;
else if(income <= 141250)
tax = income * .3;
else if(income <= 307050)
tax = income * .35;
else
tax = income * .386;
System.out.printf(\"Income tax for a single person making $%.2f income is $%.2f\ \", income, tax);
}
}
Grade range:
package gradeupdate;
import java.util.Scanner;
public class GradeUpdate {
public static void main(String[] args) {
int grade;
System.out.print(\"Enter grade between 0 and 100: \");
Scanner input = new Scanner(System.in);
grade = input.nextInt();
if (grade>=90 & grade<=100) {
System.out.println(\"You got an A. Excellent!\");
} else if (grade>=80 & grade<90) {
System.out.println(\"You got a B. Good!\");
} else if (grade>=70 & grade<80) {
System.out.println(\"You got a C. OK\");
} else if (grade>=60 & grade<70) {
System.out.println(\"You got a D. Try harder\");
} else {
System.out.println(\"You got an F. Try harder\");
}
}
}
Solution
I kept you code in this program and done some modifications.Thank You
Menu.java
import java.util.Scanner;
public class Menu {
public static void main(String[] args) {
//Declaring variable
int option;
//Scanner class Object is used to read the inputs entered by the user
Scanner sc=new Scanner(System.in);
//This do-while loop continues to execute until user select option \'4\'
do
{
//Displaying the menu
System.out.println(\"\ *****************************\");
System.out.println(\"* Main Menu:\");
System.out.println(\"* 1. Moon Weight Calculator \");
System.out.println(\"* 2. Tax rate Calculator \");
System.out.println(\"* 3. Grade Range \");
System.out.println(\"* 4. Quit \");
System.out.println(\"*****************************\");
//Getting the user selected option
System.out.print(\"You Selected Option :\");
option=sc.nextInt();
/* Based on the user selected option the
* corresponding case will get executed
*/
switch(option)
{
case 1:{
//Declaring variables
double earthWeight; //weight on earth
double moonWeight; //weight on moon
//This loop continue to execute until user entered positive number
while(true)
{
//getting the weight of the person on the earth
System.out.print(\"\ Enter your weight in pounds: \");
earthWeight = sc.nextDouble();
if(earthWeight <= 0.0)
{
//Displaying error message
System.out.print(\":: Please enter a positive number :: \");
continue;
}
else
break;
}
//Calculating the weight on the moon
moonWeight = earthWeight * 0.17;
//Displaying the weight on the moon
System.out.printf(\"%.2f earth pounds is equal to %.2f moon pounds.\",earthWeight,moonWeight);
continue;
}
case 2:{
double tax;
//Getting the taxable amount entered by the user.
System.out.print(\"Enter the Single Filers Income: \");
double income = sc.nextDouble();
/* Based on the taxable amount the corresponding
* block of code will get executed.
*/
if(income <= 6000)
tax = income * .1;
else if(income <= 27950)
tax = income * .15;
else if(income <= 67700)
tax = income * .27;
else if(income <= 141250)
tax = income * .3;
else if(income <= 307050)
tax = income * .35;
else
tax = income * .386;
//Displaying the tax
System.out.printf(\"Income tax for a single person making $%.2f income is $%.2f\ \", income, tax);
continue;
}
case 3:{
//Declaring variables
int grade;
//Getting the Grade entered by the user.
System.out.print(\"Enter grade between 0 and 100: \");
grade = sc.nextInt();
//Based on the grade value the corresponding block of code will get executed.
if (grade>=90 & grade<=100) {
System.out.println(\"You got an A. Excellent!\");
} else if (grade>=80 & grade<90) {
System.out.println(\"You got a B. Good!\");
} else if (grade>=70 & grade<80) {
System.out.println(\"You got a C. OK\");
} else if (grade>=60 & grade<70) {
System.out.println(\"You got a D. Try harder\");
} else {
System.out.println(\"You got an F. Try harder\");
}
continue;
}
case 4:{
break;
}
}
}while(option!=4);
}
}
_______________________________________
Output:
*****************************
* Main Menu:
* 1. Moon Weight Calculator
* 2. Tax rate Calculator
* 3. Grade Range
* 4. Quit
*****************************
You Selected Option :1
Enter your weight in pounds: -150
:: Please enter a positive number ::
Enter your weight in pounds: -100
:: Please enter a positive number ::
Enter your weight in pounds: 160
160.00 earth pounds is equal to 27.20 moon pounds.
*****************************
* Main Menu:
* 1. Moon Weight Calculator
* 2. Tax rate Calculator
* 3. Grade Range
* 4. Quit
*****************************
You Selected Option :2
Enter the Single Filers Income: 60000
Income tax for a single person making $60000.00 income is $16200.00
*****************************
* Main Menu:
* 1. Moon Weight Calculator
* 2. Tax rate Calculator
* 3. Grade Range
* 4. Quit
*****************************
You Selected Option :3
Enter grade between 0 and 100: 91
You got an A. Excellent!
*****************************
* Main Menu:
* 1. Moon Weight Calculator
* 2. Tax rate Calculator
* 3. Grade Range
* 4. Quit
*****************************
You Selected Option :4
_______________Thank You
