Every time I run this code I get two errors. It's wrote in C# and I can't figure out what I'm missing or why it's not running properly. These are two separate classes but are for the same project.

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RecursiveMethod
{
    class Program
    {
        static bool ordering = true;
        static string str;
        static int quantity = 0;
        static string Invoic = string.Empty;
        static double itemPrice;
        static double totalCost = 0;
        static void Main(string[] args)
        {
            int menuOption;
            int Item = 0;

            Console.WriteLine("Enter your FirstName"); //First Name 
            string sFirstName = Console.ReadLine();

            Console.WriteLine("Enter your LastName"); //Last Name
            string sLastName = Console.ReadLine();

            Console.WriteLine("Enter your ID"); //Last Name
            string sStudentID = Console.ReadLine();

            str = sFirstName + sLastName;

            //Call this methos to show student info staring of the programm
            displayStudentInfo(str,sStudentID);

            //display your message function
            displayMessage(str);


            string invoice = string.Empty;
            while (ordering)
            {
                Console.WriteLine("Enter your item");
                menuOption = Convert.ToInt32(Console.ReadLine());
                double cost;
                
                switch (menuOption)
                {
                    case 1:
                        Item = 1;
                        ProgressLogic.addItem(1, invoice, out Invoic, out quantity,out itemPrice);
                        invoice = Invoic;
                        cost = displayTotal(itemPrice, quantity);
                        break;
                    case 2:
                        Item = 2;
                        ProgressLogic.addItem(2, invoice, out Invoic, out quantity, out itemPrice);
                        invoice = Invoic;
                        cost = displayTotal(itemPrice, quantity);
                        break;
                    case 0:                       
                        done(totalCost, invoice);
                        Console.ReadLine();
                        break;
                    default:
                        Console.WriteLine("Invalid Option");
                        break;
                }
            }

        }

        /// <summary>
        /// Show the Message
        /// </summary>
        /// <param name="str"></param>
        public static void displayMessage(string str)
        {
            Console.WriteLine("Welcome " + str + " to dave onlines coffee shop");
        }

        /// <summary>
        /// Show the Student Info
        /// </summary>
        /// <param name="studentFullName"></param>
        /// <param name="iStudentID"></param>
        public static void displayStudentInfo(string studentFullName, string iStudentID)
        {
            Console.WriteLine("Welcome " + studentFullName + " Student ID - " + iStudentID);
            Console.WriteLine("Please choose the following Products code. Enter 0 to Exit");
            Console.WriteLine("Product 1 kona bled -> $14.95");
            Console.WriteLine("Product 2 cafe verona -> $9.95");
        }

        /// <summary>
        /// Done Method to show the information based on the total cost calculations
        /// </summary>
        /// <param name="totalCost"></param>
        public static void done(double totalCost, string strInvoice)
        {
            ordering = false;
            Console.WriteLine("Customer Name");
            Console.WriteLine("\n"+ strInvoice);
            Console.WriteLine("\n"+"Total Cost"+ totalCost + "$");
        }

        /// <summary>
        /// Disaply the total cost
        /// </summary>
        /// <param name="itemPrice"></param>
        /// <param name="quant"></param>
        /// <returns></returns>
        public static double displayTotal(double itemPrice, double quant)
        {
            double cost = (itemPrice * quant);
            totalCost += cost;
            return totalCost;
        }
    }
}

using Microsoft.SqlServer.Server;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RecursiveMethod
{
    public class ProgressLogic
    {
       
       //This method will do the programming logic and will return the calculations in the out parameter       
        public static double addItem(int item, string oldInvoiceString, out string Invoice, out int quantity, out double itemPrice) {
           //we need to initialize the out parameters first so definitily it will some value instead of nothig
           //ow it will show error
            Invoice = "";
            quantity = 0;
            itemPrice = 00.00;
            
            if (item == 1) {
                itemPrice = 14.95;
                Console.WriteLine("Enter Quantity"); //Last Name
                quantity = Convert.ToInt32( Console.ReadLine());
                Invoice = oldInvoiceString + " Product 1 kona Blend -> $" + itemPrice + " * " + quantity + " = " + itemPrice * quantity + "\n";
            }

            if (item == 2)
            {
                itemPrice = 9.95;
                Console.WriteLine("Enter Quantity"); //Last Name
                quantity = Convert.ToInt32(Console.ReadLine());
                Invoice = oldInvoiceString + "Product 2 cafe verona-> $" + itemPrice + " * " + quantity + " = " + itemPrice * quantity + "\n";
            }

            return itemPrice;
        }

        
    }
}

You are asked to write a simple C++ phonebook application program. Here are the requirements for the application.

• read the contact information from a given input file (phonebook.txt) into a dynamically created array of Contact objects. Each line of the input line includes name and phone information of a contact. Assume that each name has a single part
• Allow to perform operations on array of data such as search for a person, create a new contact or delete an existing contact

A sample run:

***MY PHONEBOOK APPLICATION***

Please choose an operation:

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): A

Enter name: MARY SMITH

Enter phone: 5062396

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): S

Enter name: MARY SMITH

Phone Number: 5062396

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): L

BARBARA BROWN 4059171

ELIZABETH JONES 2736877

LINDA WILLIAMS 3532665

PATRICIA JOHNSON 973437

…

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): D

Enter name: LINDA WILLIAMS

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): L

BARBARA BROWN 4059171

ELIZABETH JONES 2736877

PATRICIA JOHNSON 973437

…

A(Add) | S (Search) | D(Delete) |L(List) |Q(Quit): Q

One tents has provided their per-unit sales and cost information for the year ended December 31, 2018. All per-unit costs below are based on the production and sale of 3,000 name tents. the relevant range is 0 - 3,500 tents

Sales $45

Costs

variable costs

direct materials 5

direct labor 7

Manufacturing Overhead 13

Period Costs 4

Fixed Costs

Manufacturing Overhead 5

Period cost 7

1. if 2000 tents are produced and sold, what is the product cost per tent?

2. what is the fixed cost per tent at 1000 tents( including costs) produced and sold?

3. what are the total fixed costs in this example at 2000 name tent (produced and sold)?

4. what are the total variable costs in this example at 2000 name tents (produced and sold)?

5. what are the total period costs at 2000 name tents(produced and sold)?

6. will Nancy's turn a profit if they sell 2000 name tents?

7. what is the cost equation of nancy's?

8. what is the contribution margin per unit?

9. how many units does nancy need to sell in order to break even if she them at the price listed at above?

10. if nancy expects to sell only 2000 tents, what price should she charge to break even?

1. Create a new PHP document (Unit Objective 1)
2. Write a comment similar to the following: "This is my first PHP document, which displays some data in the web browser"(Unit Objective 1)
3. Assign your name as a string value into the variable labeled myName (Unit Objective 2)
4. Assign 53870 numeric value into the variable named randomNumber (Unit Objective 2)
5. Assign the name of the web browser and operating system of the user accessing the file into the variable named userAgent (Unit Objective 2)
6. Assign the file name of the currently running script into the variable named fileName (Unit Objective 3)
7. Assign the IP address from which the user is viewing the current page into the variable named ipAddress (Unit Objective 3)
8. Use echo command in order to display some informative descriptions followed by the values of myNem, randomNumber, userAgent, fileName, and ipAddress variables in the web browser. Each informative description and the value pair whould be displayed on a separate line (Unit Objective 4)
9. Save the file as myFirstPHP.php
10. Create a folder within the public_html folder in your account in people.ysu.edu, name this folder as "e_commerce".
11. Create another folder within the "e_commerce" folder you just created, and name this folder as "Assignment_1", and upload "myFirstPHP.php" file into the "Assignment_1" folder.
12. Attach "myFirstPHP.php" file to your response to this assignment, and submit it.

1. Create a new PHP document (Unit Objective 1)
2. Write a comment similar to the following: "This is my first PHP document, which displays some data in the web browser"(Unit Objective 1)
3. Assign your name as a string value into the variable labeled myName (Unit Objective 2)
4. Assign 53870 numeric value into the variable named randomNumber (Unit Objective 2)
5. Assign the name of the web browser and operating system of the user accessing the file into the variable named userAgent (Unit Objective 2)
6. Assign the file name of the currently running script into the variable named fileName (Unit Objective 3)
7. Assign the IP address from which the user is viewing the current page into the variable named ipAddress (Unit Objective 3)
8. Use echo command in order to display some informative descriptions followed by the values of myNem, randomNumber, userAgent, fileName, and ipAddress variables in the web browser. Each informative description and the value pair whould be displayed on a separate line (Unit Objective 4)
9. Save the file as myFirstPHP.php
10. Create a folder within the public_html folder in your account in people.ysu.edu, name this folder as "e_commerce".
11. Create another folder within the "e_commerce" folder you just created, and name this folder as "Assignment_1", and upload "myFirstPHP.php" file into the "Assignment_1" folder.
12. Attach "myFirstPHP.php" file to your response to this assignment, and submit it.

PYTHON - You are given a data.csv file in the /root/customers/ directory containing information about your customers. It has the following columns: ID,NAME,CITY,COUNTRY,CPERSON,EMPLCNT,CONTRCNT,CONTRCOST where ID: Unique id of the customer NAME: Official customer company name CITY: Location city name COUNTRY: Location country name CPERSON: Email of the customer company contact person EMPLCNT: Customer company employees number CONTRCNT: Number of contracts signed with the customer CONTRCOST: Total amount of money paid by customer (float in format dollars.cents) Read and analyze the data.csv file, and output the answers to these questions: How many total customers are in this data set? How many customers are in each city? How many customers are in each country? Which country has the largest number of customers' contracts signed in it? How many contracts does it have? How many unique cities have at least one customer in them? The answers should be formatted as: Total customers: Customers by city: : : ... Customers by country: : : ... Country with most customers' contracts: USA ( contracts) Unique cities with at least one customer: The answers for Customers by city and Customers by country must be sorted by CITY and COUNTRY respectively, in ascending order. If there are several cities that are tied for having the most customers' contracts, print the lexicographically bigger one.

Identify every possible primary key, candidate key, and foreign key for the following relations. Separate each key using a semicolon to avoid confusion.

Assumptions: MIScompany has branches located in several states within the United States. A customer can be an individual or organization. driverId is the driving license number, ssno is the social security number and upc is the universal product code. Any equipment is rented and returned at the same branch. A customer can be a manufacturer and vice versa. (Minus 1 point for each wrong answer)

            MIScompany (name, address, phone, email, FedTaxId, StaTaxId)

Primary key:

Candidate key:

Foreign key: none

branch (branchId, name, address, phone, email, FedTaxId, StaTaxId)

Primary key:

Candidate key:

Foreign key:

employee (empId, driverId, ssno, name, branchId)

Primary key:

Candidate key:

Foreign key:

customer (custId, name, address, driverId, ssno, FedTaxId, StaTaxId)

Primary key:   

Candidate key:

Foreign key:

equipment (equipId, type, upc, purchaseDate, year, manufacturId, cost, rentFee, branchId)

Primary key:

Candidate key:

Foreign key:

manufacturer (manufacturId, name, FedTaxId, StaTaxId, phone, email)

Primary key:

Candidate key:

Foreign key:

rental (rentalId, equipId, custId, rentDate&time, returnDate&time, empId, branchId)

Primary key:

Candidate key:

Foreign key: equipId;

We will extend project 2 by wrapping our input and output in a while loop. Repeatedly do the following:

Prompt the user for their name, get and store the user input.

Prompt the user for their age, get and store the user input. We will assume that the user will enter a positive integer and will do no error checking for valid input.

Determine and store a movie ticket price based on the user's age. If their age is 12 or under, the ticket price is $5. If their age is between 13 and 64, inclusive, the ticket price is $10. If their age is 65 or greater, the ticket price is $8.

When all the user input has been gathered, print out a meaningful label such as 'Name: ' followed by the entire user name on one line. On the next line, print out a meaningful label such as 'Age: ' followed by the user's age. On the next line, print out a meaningful label such as 'Ticket Price: ' followed by the ticket price your program calculated. Your output should look something like this:

Name: Mickey M Mouse

Age: 19

Ticket Price: $10

Now prompt the user asking if they would like to enter another ticket buyer's name. If they answer 'y' for yes, perform the loop again getting the input from the user, calculate the ticket price, and output the information. If the user answers anything other than 'y' the loop should exit.

in Python please

I am getting the following error: SalaryCalc.java:41: error: variable shift might not have been initialized if(shift==0) ^ 1 error

Please FIX

This is my Java code:

import java.util.Scanner;
public class SalaryCalc
{
double Rpay=0, Opay=0;
void calPay(double hours, double rate){
if(hours<=40){
Rpay = hours * rate;
Opay = 0;
}
else {
double Rhr,Ohr;
Rhr = 40;
Ohr = hours-Rhr;
Rpay = Rhr * rate;
Opay = Ohr * (1.5*rate);
}
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String name;
int shift;
Double rate, hours;
System.out.println("Pay Calculator");
System.out.println("Enter Your Name");
name=sc.next();
System.out.println("Enter Your Shift, Enter 0 for Day, Enter1 for Night");
System.out.println("0=Day, 1= Night");
System.out.println("Enter Number of Hours Worked");
hours=sc.nextDouble();
System.out.println("Enter Hourly Pay");
rate=sc.nextDouble();
SalaryCalc c= new SalaryCalc();
c.calPay(hours,rate);
Double Tpay= c.Rpay+ c.Opay;
System.out.println();
System.out.println("Calculate Pay");
System.out.println("Employee Name: "+name);
System.out.println("Employee Regular Pay: "+c.Rpay);
System.out.println("Employee Overtime Pay: "+c.Opay);
System.out.println("Employee Total Pay: "+Tpay);
if(shift==0)
{
System.out.println("Employee PayPeriod is Friday");
}
else{
System.out.println("Employee PayPeriod is Saturday");
}
}

}

Updating the following Java program below, I need to continue to take input for every employee in a company, and display their information until a sentinel value is entered that exits the loop and ends the program

import java.util.Scanner;
public class SalaryCalc
{
double Rpay=0, Opay=0;
void calPay(double hours, double rate)
{
if(hours<=40)
{
Rpay = hours * rate;
Opay = 0;
}
else
{
double Rhr,Ohr;
Rhr = 40;
Ohr = hours-Rhr;
Rpay = Rhr * rate;
Opay = Ohr * (1.5*rate);
}
}
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
String name;
int shift = 0;
Double rate, hours;
System.out.println("Pay Calculator");
System.out.println("Enter Your Name");
name=sc.next();
System.out.println("Enter Your Shift, Enter 0 for Day, Enter1 for Night");
System.out.println("0=Day, 1= Night");
System.out.println("Enter Number of Hours Worked");
hours=sc.nextDouble();
System.out.println("Enter Hourly Pay");
rate=sc.nextDouble();
SalaryCalc c= new SalaryCalc();
c.calPay(hours,rate);
Double Tpay= c.Rpay+ c.Opay;
System.out.println();
System.out.println("Calculate Pay");
System.out.println("Employee Name: "+name);
System.out.println("Employee Regular Pay: "+c.Rpay);
System.out.println("Employee Overtime Pay: "+c.Opay);
System.out.println("Employee Total Pay: "+Tpay);
if(shift==0)
{
System.out.println("Employee PayPeriod is Friday");
}
else
{
System.out.println("Employee PayPeriod is Saturday");
}
}
}