Homework Help is Here – Start Your Trial Now!
Engineering
Computer Science
hello, below i done a coding on visual studios but theres an error that keeps showing which is underlined and bold below, can you fix this?

hello, below i done a coding on visual studios but theres an error that keeps showing which is underlined and bold below, can you fix this?

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
See similar textbooks
icon
Related questions
Question
hello, below i done a coding on visual studios but theres an error that keeps showing which is underlined and bold below, can you fix this?
 
class Program
    {
        static void Main(string[] args)
        {
            List<String> nameList = new List<String>();
            int choice;
 
            do
            {
                DisplayMenu();
                choice = Convert.ToInt32(Console.ReadLine());
 
                
                switch (choice)
                {
                    case 1:
                        { // if user enters option 1
                            Console.WriteLine("\nShow Names:\n-----------");
                            DisplayAllNames(nameList);
                            break;
                        }
                    case 2:
                        { // if user enters option 2
                            Console.WriteLine("\nAdd Name:\n---------");
                            AddName(nameList);
                            break;
                        }
                    case 3:
                        { // if user enters option 3
                            Console.WriteLine("\nChange Name:\n------------");
                            ChangeName(nameList);
                            break;
                        }
                    case 4:
                        { // if user enters option 4
                            Console.WriteLine("\nRemove Name:\n------------");
                            RemoveName(nameList);
                            break;
                        }
                    case 5:
                        { // if user enters option 5
                            Console.WriteLine("\nGoodbye!\n");
                            break;
                        }
                    default:  // if user enters any other option
                        Console.WriteLine("\nInvalid choice!\n");
                        break;
                }
            } while (choice != 5);
        }
 
 
        public static void DisplayMenu()
        {
            Console.Write("Choose from the following options:\n(1) Show Names\n(2) Add Name\n(3) Change Name\n(4) Remove Name\n(5) Exit\nYour selection: ");
        }
 
        public static void DisplayAllNames(List<String> names)
        {
            if (names.Count == 0)
            {
                Console.WriteLine("List is empty!\n");
                return;
            }
            Console.WriteLine("There are {0} names in the list:", names.Count);
            for (int i = 0; i < names.Count; i++)
            {  
                Console.WriteLine(names[i]);
            }
            Console.WriteLine();
        }
 
        public static int indexOf(List<String> names, String name)
        {
            int index = -1;
            for (int i = 0; i < names.Count; i++)
            {
                if (names[i].ToLower() == name.ToLower())
                { 
                    index = i;
                    break; 
                }
            }
            return index; // return the index
        }
 
        public static void AddName(List<String> names)
        {
            Console.Write("Enter the name to add: "); 
            String userName = Console.ReadLine().Trim();
 
            if (indexOf(names, userName) != -1)
            { 
                Console.WriteLine("{0} is already in the list!\n", userName);
                return;
            }
            
            names.Add(userName);
            Console.WriteLine("{0} is added to the list.\n", userName); // display a confirmation message
        }
 
        public static void ChangeName (List<String> names)
        {
            Console.Write("Enter an old name: "); 
            String userName = Console.ReadLine().Trim();
            int indexOfName = indexOf(names, userName);
 
            if (indexOfName == -1)
            {  
                Console.WriteLine("{0} is not present in the list!\n", userName); 
                return;
            }
            Console.Write("Enter a new name to update: ");
            String newUserName = Console.ReadLine().Trim(); 
            names[indexOfName] = newUserName; 
            Console.WriteLine("The name is successfully updated to: {0}.\n", newUserName);
        }
 
        public static void RemoveName (List<String>names)
        {
            Console.Write("Enter a name to remove: ");
            String userName = Console.ReadLine().Trim();
            int indexOfName = indexOf(names, userName); 
            
            if (indexOfName == -1)
            {  
                Console.WriteLine("{0} is not present in the list!\n", userName); // display a message that the name is not present in the list
                return;
            }
            names.RemoveAt(indexOfName); 
            Console.WriteLine("{0} is successfully removed from the list.\n", userName);
        }
   
Expert Solution
steps

Step by step

Solved in 4 steps with 9 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Managing System
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
SEE MORE TEXTBOOKS