Question

You are going to implement a command-line student management system.
Users can type four commands (case insensitive):
 Create command to create new student record with 4 pieces of information separated by
comma: student ID (string), name (string), major (string), GPA (floating point)
o For example: create:105,Alice,EECS,2.54
 Sort command to display all the student records in sorted order either by name or by GPA (the
sorting criteria is case insensitive)
o For example: sort:name
 Search command to find a student record by the student ID
o For example: search:105

Answer 1

Answer on Question#37723- Programming, C#

1. You are going to implement a command-line student management system.

Users can type four commands (case insensitive):

- Create command to create new student record with 4 pieces of information separated by comma: student ID (string), name (string), major (string), GPA (floating point)

o For example: create:105,Alice,EECS,2.54

- Sort command to display all the student records in sorted order either by name or by GPA (the sorting criteria is case insensitive)

o For example: sort:name

- Search command to find a student record by the student ID

o For example: search:105

Solution.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            PrintResult pr = new PrintResult();
            pr.Print();
            Console.Read();
        }
    }
    public class Student
    {
        public string ID;
        public string name;
        public string major;
        public double GPA;
        public void View()
        {
            Console.WriteLine(ID + " " + name + " " + major + " " + GPA);
        }
    }
}
class PrintResult
{
    SortedList<string, Student> std;
    public PrintResult()
    {
        std = new SortedList<string, Student>();
    }
    public void GetData()
    {
        Student stud = new Student();
        Console.WriteLine("Enter the ID of the student:");
        stud.ID = Console.ReadLine();
        Console.WriteLine("Enter the name of the student:");
        stud.name = Console.ReadLine();
        Console.WriteLine("Enter the major of the student:");
        stud.major = Console.ReadLine();
        Console.WriteLine("Enter the GPA of the student:");
        stud.GPA = Convert.ToDouble(Console.ReadLine());
        std.Add(stud.ID, stud);
        returnPrint();
    }
    public void Print()
    {
        Console.Clear();
        Console.WriteLine("Select the menu item:");
        Console.WriteLine("===================\n");
        Console.WriteLine("1. Create command to create new student record");
        Console.WriteLine("2. Sort command to display all the student records in sorted order either by name or by GPA");
        Console.WriteLine("3. Search command to find a student record by the student ID");
        Console.WriteLine("4. Show all students");
        string sMenu;
        sMenu = Console.ReadLine();
        switch (sMenu)
        {
            case "1":
                { GetData(); break; }
            case "2":
                { Sort(); break; }
            case "3":
                { Find(); break; }
            case "4":
                { AllView(); break; }
            default:
                { Console.WriteLine("Wrong the chosen menu item!"); returnPrint();
                break;
                }
        }
    }
    public void Find()
    {
        string s;
        s = Console.ReadLine();
        std[s].View();
        returnPrint();
    }
    public void AllView()
    {
        foreach (string s in std.Keys)
        {
            std[s].View();
        }
        returnPrint();
    }
    public void Sort()
    {
        SortedList s = new SortedList();
        Console.WriteLine("1.By Name " + "2. By GPA");
        if (Console.ReadLine() == "1")
        {
            foreach (string sid in std.Keys)
            {
                s.Add(std[sid].name, std[sid]);
            }
            for (int i = 0; i < s.Count; i++)
            {
                Console.WriteLine("{0}", s.GetKey(i).ToString());
            }
        }
        if (Console.ReadLine() == "2")
        {
            foreach (string sid in std.Keys)
            {
                s.Add(std[sid].GPA, std[sid]);
            }
            for (int i = 0; i < s.Count; i++)
            {
                Console.WriteLine("{0}", s.GetKey(i));
            }
        }
        returnPrint();
    }
    public void returnPrint()
    {
        Console.WriteLine("Return in main menu?\n" + "1. Yes " + "2. No");
        if (Console.ReadLine() == "1") { Print(); }
    }
}

You can also run the file in the attached file .exe