CODEWITHSUNDEEP
c#windowsclass
Robert C.
Robert C.

Reputation: 17

Troubleshooting: does not contain a static 'main' method suitable for an entry point

I am trying to create a multi class program that creates student objects then allows you to change the value for the undeclared major for one of the student objects.

Here is my code:

StudentApp.cs:

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

namespace PA04CoddR
{
    class StudentApp
    {

        public void Main()
        {
            DisplayTitle();
            Student firstStudent = new Student("Robert", "Codd");
            DisplayInfo(firstStudent);
            Student secondStudent = new Student("Alexander", "Clemens", "FIN");
            DisplayInfo(secondStudent);
            GetMajor(firstStudent);
            DisplayInfo(firstStudent);
            TerminateProgram();

        }

        public void DisplayTitle()
        {
            Console.WriteLine("Programming Assignment 4 - Creating a Class - Robert S. Codd");
            Console.WriteLine();
            Console.WriteLine("____________________________________________________________");

        }

        public void DisplayInfo(Student newStudent)
        {
            Console.WriteLine("Frist Name: " + newStudent.GetFirstName);
            Console.WriteLine("Last Name: " + newStudent.GetLastName);
            Console.WriteLine("Major: " + newStudent.GetMajor);

        }

        public void GetMajor(Student newStudent)
        {
            Console.WriteLine("\tHello {0} {1}", newStudent.GetFirstName, newStudent.GetLastName);
            Console.WriteLine("\tPlease enter your major: ");
            string majorIn = Console.ReadLine();
            Console.WriteLine();
            newStudent.SetMajor(majorIn);

        }

        public void TerminateProgram()
        {
            Console.WriteLine("___________________________________________________________");
            Console.WriteLine("PRESS ANY KEY TO TERMINATE...");
            Console.Read();

        }
    }
}

Student.CS:

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

namespace PA04CoddR
{
    class Student
    {
        private string firstName;
        private string lastName;
        private string major;

        public Student()
        {
        }

        public Student(string firstName, string lastName)
        {
            firstName = GetFirstName;
            lastName = GetLastName;
            major = "Undeclared";
        }

        public Student(string firstName, string lastName, string major)
        {
            firstName = GetFirstName;
            lastName = GetLastName;
            major = GetMajor;
        }

        public string GetFirstName
        {
            get
            {
                return firstName;
            }
            set
            {
                firstName = value;
            }
        }

        public string GetLastName
        {
            get
            {
                return lastName;
            }
            set
            {
                lastName = value;
            }
        }

        public string GetMajor
        {
            get
            {
                return major;
            }
            set
            {
                major = value;
            }
        }

        public string SetMajor(string majorIn)
        {
            major = majorIn;
            return majorIn;
        } 
    }
}

I have no errors being listed or given in the IDE but as soon as I try to compile the program it returns the error: "Does not contain a static 'main' method suitable for an entry point"

I did some research on here and other online resources and found a few things that seemed promising for solving my problem like changing the main method to static but as soon as I tried that every thing in my main method is returning a syntax error: "An object reference is required for the non-static field, method, or property"

Any help at all would be greatly appreciated, I am a learning programmer so I'm sure it is something fairly simple and I just do not full understand the concepts.

Upvotes: 1

Views: 424

Answers (4)

Tinwor
Tinwor

Reputation: 7973

You must add static to public void Main like this:

public static void main(string[]args)
{
   //Your code
}

If want use the other class you must add static to Student class and its all methods and to Student like StudentApp. This because a static method can call only other static methods.

Upvotes: 1

Dai
Dai

Reputation: 155005

Your Main method must be static, change the other methods in StudentApp to static too as they do not make use of any instance state.

Upvotes: 1

Karl Anderson
Karl Anderson

Reputation: 34846

You have this:

public void Main()

But you need to have this:

public static void Main()

Upvotes: 1

Reed Copsey
Reed Copsey

Reputation: 564333

Your main routine needs to be static:

 public static void Main()
 {

However, doing that will require you to create an instance of StudentApp:

 public static void Main()
 {
     var app = new StudentApp();
     app.DisplayTitle(); // Call method on the instance

     // Do the same for your other methods...

This is because your other methods that your Main() methods use are instance methods, not static methods.

Upvotes: 4

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