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In C# using System; using static System.Console; using System.Globalization; class JobDemo4 {    static void Main()    {       RushJob[] jobs = new RushJob[5];       int x, y;       double grandTotal = 0;       bool goodNum;       for(x = 0 ; x < jobs.Length; ++x)       {          jobs[x] = new RushJob();          Write("Enter job number ");          jobs[x].JobNumber = Convert.ToInt32(ReadLine());          goodNum = true;          for(y = 0; y < x; ++y)          {             if(jobs[x].Equals(jobs[y]))                goodNum = false;          }          while(!goodNum)          {              Write("Sorry, the job number " +                 jobs[x].JobNumber + " is a duplicate. " +                 "\nPlease reenter ");              jobs[x].JobNumber = Convert.ToInt32(ReadLine());              goodNum = true;              for(y = 0; y < x; ++y)              {                 if(jobs[x].Equals(jobs[y]))                    goodNum = false;              }          }          Write("Enter customer name ");          jobs[x].Customer = ReadLine();          Write("Enter description ");          jobs[x].Description = ReadLine();          Write("Enter estimated hours ");          jobs[x].Hours = Convert.ToDouble(ReadLine());       }       WriteLine("\nSummary:\n");       for(x = 0; x < jobs.Length; ++x)       {          WriteLine(jobs[x].ToString());          grandTotal += jobs[x].Price;       }       WriteLine("\nTotal for all jobs is " + grandTotal.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }   }    class Job {    protected double hours;    protected double price;    public const double RATE = 45.00;    public Job(int num, string cust, string desc, double hrs)    {       JobNumber = num;       Customer = cust;       Description = desc;       Hours = hrs;    }    public int JobNumber {get; set;}    public string Customer {get; set;}    public string Description {get; set;}    public double Hours    {       get       {          return hours;       }       set       {          hours = value;          price = hours * RATE;       }    }    public double Price    {        get        {           return price;        }   }    public override string ToString()    {       return(GetType() + " " + JobNumber + " " + Customer + " " +          Description + " " + Hours + " hours @" + RATE.ToString("C") +          " per hour. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }    public override bool Equals(Object e)    {       bool equal;       Job temp = (Job)e;       if(JobNumber == temp.JobNumber)         equal = true;       else         equal = false;       return equal;    }    public override int GetHashCode()    {       return JobNumber;    } } class RushJob : Job {    public const double PREMIUM = 150.00;    public RushJob() :base(0, "", "", 0)    {    }     public override string ToString()    {       return(GetType() + " " + JobNumber + " " + Customer + " " +          Description + " " + Hours + " hours @" + RATE.ToString("C") +          " per hour. Rush job adds " + PREMIUM +          " premium. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }    public new double Hours    {       get       {          return hours;       }       set       {          hours = value;          price = hours * RATE + PREMIUM;       }    } }

In C# using System; using static System.Console; using System.Globalization; class JobDemo4 {    static void Main()    {       RushJob[] jobs = new RushJob[5];       int x, y;       double grandTotal = 0;       bool goodNum;       for(x = 0 ; x < jobs.Length; ++x)       {          jobs[x] = new RushJob();          Write("Enter job number ");          jobs[x].JobNumber = Convert.ToInt32(ReadLine());          goodNum = true;          for(y = 0; y < x; ++y)          {             if(jobs[x].Equals(jobs[y]))                goodNum = false;          }          while(!goodNum)          {              Write("Sorry, the job number " +                 jobs[x].JobNumber + " is a duplicate. " +                 "\nPlease reenter ");              jobs[x].JobNumber = Convert.ToInt32(ReadLine());              goodNum = true;              for(y = 0; y < x; ++y)              {                 if(jobs[x].Equals(jobs[y]))                    goodNum = false;              }          }          Write("Enter customer name ");          jobs[x].Customer = ReadLine();          Write("Enter description ");          jobs[x].Description = ReadLine();          Write("Enter estimated hours ");          jobs[x].Hours = Convert.ToDouble(ReadLine());       }       WriteLine("\nSummary:\n");       for(x = 0; x < jobs.Length; ++x)       {          WriteLine(jobs[x].ToString());          grandTotal += jobs[x].Price;       }       WriteLine("\nTotal for all jobs is " + grandTotal.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }   }    class Job {    protected double hours;    protected double price;    public const double RATE = 45.00;    public Job(int num, string cust, string desc, double hrs)    {       JobNumber = num;       Customer = cust;       Description = desc;       Hours = hrs;    }    public int JobNumber {get; set;}    public string Customer {get; set;}    public string Description {get; set;}    public double Hours    {       get       {          return hours;       }       set       {          hours = value;          price = hours * RATE;       }    }    public double Price    {        get        {           return price;        }   }    public override string ToString()    {       return(GetType() + " " + JobNumber + " " + Customer + " " +          Description + " " + Hours + " hours @" + RATE.ToString("C") +          " per hour. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }    public override bool Equals(Object e)    {       bool equal;       Job temp = (Job)e;       if(JobNumber == temp.JobNumber)         equal = true;       else         equal = false;       return equal;    }    public override int GetHashCode()    {       return JobNumber;    } } class RushJob : Job {    public const double PREMIUM = 150.00;    public RushJob() :base(0, "", "", 0)    {    }     public override string ToString()    {       return(GetType() + " " + JobNumber + " " + Customer + " " +          Description + " " + Hours + " hours @" + RATE.ToString("C") +          " per hour. Rush job adds " + PREMIUM +          " premium. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));    }    public new double Hours    {       get       {          return hours;       }       set       {          hours = value;          price = hours * RATE + PREMIUM;       }    } }

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

In C#

using System;
using static System.Console;
using System.Globalization;

class JobDemo4
{
   static void Main()
   {
      RushJob[] jobs = new RushJob[5];
      int x, y;
      double grandTotal = 0;
      bool goodNum;
      for(x = 0 ; x < jobs.Length; ++x)
      {
         jobs[x] = new RushJob();
         Write("Enter job number ");
         jobs[x].JobNumber = Convert.ToInt32(ReadLine());
         goodNum = true;
         for(y = 0; y < x; ++y)
         {
            if(jobs[x].Equals(jobs[y]))
               goodNum = false;
         }
         while(!goodNum)
         {
             Write("Sorry, the job number " +
                jobs[x].JobNumber + " is a duplicate. " +
                "\nPlease reenter ");
             jobs[x].JobNumber = Convert.ToInt32(ReadLine());
             goodNum = true;
             for(y = 0; y < x; ++y)
             {
                if(jobs[x].Equals(jobs[y]))
                   goodNum = false;
             }
         }
         Write("Enter customer name ");
         jobs[x].Customer = ReadLine();
         Write("Enter description ");
         jobs[x].Description = ReadLine();
         Write("Enter estimated hours ");
         jobs[x].Hours = Convert.ToDouble(ReadLine());
      }
      WriteLine("\nSummary:\n");
      for(x = 0; x < jobs.Length; ++x)
      {
         WriteLine(jobs[x].ToString());
         grandTotal += jobs[x].Price;
      }
      WriteLine("\nTotal for all jobs is " + grandTotal.ToString("C", CultureInfo.GetCultureInfo("en-US")));
   }
 
}   
class Job
{
   protected double hours;
   protected double price;
   public const double RATE = 45.00;
   public Job(int num, string cust, string desc, double hrs)
   {
      JobNumber = num;
      Customer = cust;
      Description = desc;
      Hours = hrs;
   }
   public int JobNumber {get; set;}
   public string Customer {get; set;}
   public string Description {get; set;}
   public double Hours
   {
      get
      {
         return hours;
      }
      set
      {
         hours = value;
         price = hours * RATE;
      }
   }
   public double Price
   {
       get
       {
          return price;
       }
  }
   public override string ToString()
   {
      return(GetType() + " " + JobNumber + " " + Customer + " " +
         Description + " " + Hours + " hours @" + RATE.ToString("C") +
         " per hour. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));
   }
   public override bool Equals(Object e)
   {
      bool equal;
      Job temp = (Job)e;
      if(JobNumber == temp.JobNumber)
        equal = true;
      else
        equal = false;
      return equal;
   }
   public override int GetHashCode()
   {
      return JobNumber;
   }
}

class RushJob : Job
{
   public const double PREMIUM = 150.00;
   public RushJob() :base(0, "", "", 0)
   {
   } 
   public override string ToString()
   {
      return(GetType() + " " + JobNumber + " " + Customer + " " +
         Description + " " + Hours + " hours @" + RATE.ToString("C") +
         " per hour. Rush job adds " + PREMIUM +
         " premium. Total price is " + Price.ToString("C", CultureInfo.GetCultureInfo("en-US")));
   }
   public new double Hours
   {
      get
      {
         return hours;
      }
      set
      {
         hours = value;
         price = hours * RATE + PREMIUM;
      }
   }
}
a. Create an application named JobDemo that declares and uses Job objects. The Job class holds job information for a home repair service. The class has five properties that include a job number, customer name, job description, estimated hours, and price for the job. Create a constructor that requires parameters for all the data except price. Include auto-implemented properties for the job number, customer name, and job description, but not for hours or price; the price field value is calculated as estimated hours times $45.00 whenever the hours value is set. Also create the following for the class: • An Equals() method that determines two Jobs are equal if they have the same job number • A GetHashCode () method that returns the job number • A ToString() method that returns a string containing all job information The JobDemo application declares a few Job objects, sets their values, and demonstrates that all the methods work as expected. b. Using the Job class you created in Exercise 3a, write a new application named JobDemo2 that creates an array of five Job objects. Prompt the user for values for each Job. Do not allow duplicate job numbers; force the user to reenter the job when a duplicate job number is entered. When five valid objects have been entered, display them all, plus a total of all prices. c. Create a RushJob class that derives from Job. A RushJob has a $150.00 premium that is added to the normal price of the job. Override any methods in the parent class as necessary. Write a new application named JobDemo3 that creates an array of five RushJobs. Prompt the user for values for each, and do not allow duplicate job numbers. When five valid Rush Job objects have been entered, display them all, plus a total of all prices. d. Make any necessary modifications to the RushJob class so that it can be sorted by job number. Modify the JobDemo3 application so the displayed orders have been corted Saue the lication
Transcribed Image Text:a. Create an application named JobDemo that declares and uses Job objects. The Job class holds job information for a home repair service. The class has five properties that include a job number, customer name, job description, estimated hours, and price for the job. Create a constructor that requires parameters for all the data except price. Include auto-implemented properties for the job number, customer name, and job description, but not for hours or price; the price field value is calculated as estimated hours times $45.00 whenever the hours value is set. Also create the following for the class: • An Equals() method that determines two Jobs are equal if they have the same job number • A GetHashCode () method that returns the job number • A ToString() method that returns a string containing all job information The JobDemo application declares a few Job objects, sets their values, and demonstrates that all the methods work as expected. b. Using the Job class you created in Exercise 3a, write a new application named JobDemo2 that creates an array of five Job objects. Prompt the user for values for each Job. Do not allow duplicate job numbers; force the user to reenter the job when a duplicate job number is entered. When five valid objects have been entered, display them all, plus a total of all prices. c. Create a RushJob class that derives from Job. A RushJob has a $150.00 premium that is added to the normal price of the job. Override any methods in the parent class as necessary. Write a new application named JobDemo3 that creates an array of five RushJobs. Prompt the user for values for each, and do not allow duplicate job numbers. When five valid Rush Job objects have been entered, display them all, plus a total of all prices. d. Make any necessary modifications to the RushJob class so that it can be sorted by job number. Modify the JobDemo3 application so the displayed orders have been corted Saue the lication
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