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| JAVA : Exercise 1. |
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Question. Wire a Java program which performs the following problems/questions.

P1. Using if else statement make a salary tax rate (payroll system) which accepts salary from the user and replies it’s tax and net pay.

P2. Using conditional statement compare two numbers which replies the first number is greater-than/less-than the second and vice versa.

N.B. Use this Payroll System Rules
1. Below 600 birr (non-taxable)
2. Between 601 & 1,650 (10% tax & 60 birr deduction)
3. Between 1,651 & 3,200 (15% tax & 142.50 deduction)
4. Between 3,201 & 5,250 (20% tax & 302.50 deduction)
5. Between 5,251 & 7,800 (25% tax & 565 birr deduction)
6. Between 7,801 & 10,900 (30% tax & 955 birr deduction)
7. Over 10,900 (35% tax & 1500 birr deduction)

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Answers. P1: Salary Payroll & P2: Number Comparing 👇🏽👇🏽
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AI Programming @freecodecs
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Answer. P1. Salary Payroll - Java File
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Answer. P2. Number Comparing - Java File
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| JAVA : Exercise 2. |
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Question. Wire a Java program which operates as a calculator using 4 basic operations (➕➖➗✖️).

(N.B. Use switch method to perform the conditions)
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AI Programming @freecodecs
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JAVA : Ex. 2 Answer - Calculator in Plaintext Code
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(N.B. Save this class by the name Calculatorx.java to compile and run)

import java.util.Scanner;
public class Calculatorx{

public static void main(String args[]){

double result;

Scanner opr_in = new Scanner(System.in);

System.out.println("Enter the fist no. :");
double num1 = opr_in.nextDouble();

System.out.println("Enter the second no. :");
double num2 = opr_in.nextDouble();

System.out.println("Insert Operation + - * /:");
string oper_x = opr_in.nexLine();

switch(oper_x){
case “+”:
result = num1 + num2;
break;
case “-“:
result = num1 - num2;
break;
case “*”:
result = num1 * num2;
break;
case “/“:
result = num1/num2;
break;
default:
System.out.println("the operator is not set correctly!");
break;
}

System.put.println("the result is" + result);

opr_in.close();

}
}
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AI Programming @freecodecs
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Tip : If it doesn’t work or needs initializing
Just edit line 4 by (double result = 0;)
N.B. The code is without the parenthesis

Q#1. Write a menu driven program which allows a user to
A. Insert
B. Delete
C. Display details of a single student
D. Display all students
⏱ If any one want us to do Data Structure Assignment show some hand 🤚

Doubly Linked (Student Registration)
- Data Structure - Assignment
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Q#2. Write a student registration program by using doubly linked data structure way in C++
A. Insert Student Record
B. Insert in the Middle of Records
C. Delete Student (* also last record)
D. Display all Students
E. Display Single Student
F. Display Student Record Reverse

⏱ We need at list 400 🤚 (vote hands) to do this Assignment.

Doubly Linked List (Student Registration)
- Data Structure - Q#2
• Insert
• Insert After Record
• Delete
• Display All
• Display Single
• Display Reverse
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