Exercise 1: Class Employee: public class Employee { private String firstname; private String lastname; private double monthlysalary;

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Alice Atkins
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1 Exercise 1: Class Employee: public class Employee { private String firstname; private String lastname; private double monthlysalary; public String getfirstname() { return firstname; public void setfirstname(string fname) { firstname = fname; public String getlastname() { return lastname; public void setlastname(string lname) { lastname = lname; public double getmonthlysalary() { return monthlysalary; public void setmonthlysalary(double m) { if(m < 0){ monthlysalary =0; else monthlysalary = m;

2 Class EmployeeTest: import java.util.scanner; public class EmployeeTest { public static void main(string[] args){ Scanner S = new Scanner(System.in); System.out.println("Enter the first name: "); String fname = S.next(); System.out.println("Enter the last name: "); String lname = S.next(); System.out.println("Enter the Salary: "); double sal = S.nextDouble(); Employee e =new Employee(); e.setfirstname(fname); e.setlastname(lname); e.setmonthlysalary(sal); System.out.println("the yearly salary of "+e.getfirstname()+" " +e.getlastname()+" :"); System.out.println(e.getMonthlySalary()*12); double newsalary= e.getmonthlysalary()*0.1+e.getmonthlysalary(); e.setmonthlysalary(newsalary); System.out.println("the new yearly salary of "+ e.getfirstname()+" "+e.getlastname()+" :"); System.out.println(e.getMonthlySalary()*12);

3 Exercise 2: public class Invoice { private String partno, partdes; private int quantity; private double price; public String getpartno() { return partno; public void setpartno(string partno) { this.partno = partno; public String getpartdes() { return partdes; public void setpartdes(string partdes) { this.partdes = partdes; public int getquantity() { return quantity; public void setquantity(int quantity) { if(quantity < 0) this.quantity = 0; else this.quantity = quantity; public double getprice() { return price; public void setprice(double price) { if(price < 0.0) this.price = 0.0; else this.price = price; public double getinvoiceamount(){ return quantity*price;

4 Main Class: import java.util.scanner; public class InvoiceTest { public static void main(string[] args) { Scanner input = new Scanner(System.in); int c = 0; do{ System.out.println("1) calculate a new invoice"); System.out.println("2) exit"); System.out.println("your choice:"); switch(c) { case 1: System.out.println("Enter part number, description, quantity, and price per item:"); Invoice invoice = new Invoice(); Invoice.setPartNo(input.next()); Invoice.setPartDes(input.next()); Invoice.setQuantity(input.nextInt()); Invoice.setPrice(input.nextDouble()); System.out.println("Invoice amount = "+invoice.getinvoiceamount()+" S.R"); break; case 2: System.out.println("Bye"); break; default: System.out.println("Wrong choice"); while(c!= 2);

5 Exercise 3: public class Date { private int year; private int month; private int day; public int getyear(){ return year; public void setyear(int y){ if(y>=0) year = y; else year = 2000; public int getmonth(){ return month; public void setmonth(int m){ if(m>0 && m<=12) month = m; else month = 1; public int getday(){ return day; public void setday(int d){ if(d>0 && d<=30) day = d; else day = 1; public void display(){ System.out.println(day+"/"+month+"/"+year); public void increment(){ day++; if(day == 31){ day = 1; month ++; if(month == 13){ month = 1; year ++;

6 public void decrement(){ day --; if(day == 0){ day = 30; month --; if(month == 0){ month = 12; year --; //end of if //end of method //end of class

7 Main Class import java.util.scanner; public class TestDate { public static void main(string[] args) { Scanner S = new Scanner(System.in); System.out.print("Enter year of date1: "); int year1 = S.nextInt(); System.out.print("Enter month of date1: "); int month1 = S.nextInt(); System.out.print("Enter day of date1: "); int day1 = S.nextInt(); System.out.print("Enter year of date2: "); int year2 = S.nextInt(); System.out.print("Enter month of date2: "); int month2 = S.nextInt(); System.out.print("Enter day of date2: "); int day2 = S.nextInt(); Date d1 = new Date(); Date d2 = new Date(); d1.setyear(year1) d1.setmonth(month1); d1.setday(day1); d2.setyear(year2) d2.setmonth(month2); d2.setday(day2); d1.increment(); d2.decrement(); System.out.print("the value of date1 after incrementing by one is "); d1.display(); System.out.print("the value of date2 after decrementing by one is "); d2.display();

CS141 Programming Assignment #4

CS141 Programming Assignment #4 Due Sunday, Mar 3rd. 1) Create a class called Invoice that a hardware store might use to represent an invoice for an item sold at the store. An Invoice should include four