Classes And Objects

Question

Can a class have 2 objects with the same name? If yes then while displaying, which particular object's roll, name and course details get printed?

class Program
{
    static void Main(string[] args)
    {
        Student st=null;

        Console.WriteLine("Enter Records");
        for (int i = 0; i < 3; i++)
        {
            st = new Student();
            Console.WriteLine("Enter roll");
            st.roll = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter name");
            st.name = Console.ReadLine();
            Console.WriteLine("Enter course");
            st.course = Console.ReadLine();
        }

        Console.WriteLine("Show Records");
        for (int i = 0; i < 3; i++)
        {
            Console.WriteLine("Roll "+st.roll.ToString());
            Console.WriteLine("Name "+st.name);
            Console.WriteLine("Course "+st.course);
        }

        Console.ReadKey();
    }
}

class Student
{
    public int roll;
    public string name;
    public string course;
}

So, each Student needs multiple courses, or something different? — jdphenix
– jdphenix, Commented Mar 31, 2014 at 2:58
You only have one Student object in st, that keeps getting overwritten. You need to use a collection or array of Student. — OldProgrammer
– OldProgrammer, Commented Mar 31, 2014 at 2:59
@Grant Winney, it is working just fine, I m getting the right input and output but i m not confident about my understanding of the concept of objects for I have asked the query above. — androidrill
– androidrill, Commented Mar 31, 2014 at 3:08
@OldProgrammer How is it that I am still getting the right input and output when the object should practically be overwritten?? — androidrill
– androidrill, Commented Mar 31, 2014 at 3:28

Amit Joki · Accepted Answer · 2014-03-31 03:55:14Z

2

No, but you can create a List<Students> which is basically a list of Students

using System.Collections.Generic;
class Program
{
    static void Main(string[] args)
    {
        List<Student> sts = new List<Student>();
        Student st = null;
        Console.WriteLine("Enter Records");
        for (int i = 0; i < 3; i++)
        {
            st = new Student();
            Console.WriteLine("Enter roll");
            st.roll = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter name");
            st.name = Console.ReadLine();
            Console.WriteLine("Enter course");
            st.course = Console.ReadLine();
            sts.Add(st);  // this is the line to be added to populate the list
        }

        Console.WriteLine("Show Records");
        for (int i = 0; i < sts.Count; i++)
        {
            st = sts[i];  // this needs to be added to read from list
            Console.WriteLine("Roll "+st.roll.ToString());
            Console.WriteLine("Name "+st.name);
            Console.WriteLine("Course "+st.course);
        }

        Console.ReadKey();
    }
}

class Student 
{
   public int roll;
   public string name;
   public string course;
}

edited Mar 31, 2014 at 3:55

answered Mar 31, 2014 at 3:11

Amit Joki

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13 Comments

androidrill Over a year ago

My question is, how can i make multiple objects of class student with the same name, st=new student();

Amit Joki Over a year ago

If you do that, you are overriding the object

androidrill Over a year ago

Which is what I am asking, you are making an object in a loop construct, therefore, each time the loop goes to work an object with the same name gets made. st=new student();

jmoreno Over a year ago

@androidrill: no, a variable gets assigned a new value. That's not the same thing as an object with the same name.

androidrill Over a year ago

@jmoreno How is it possible? "new" keyword means a new object is being formed within the loop construct, everytime loop goes to work.

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