union and unity of binary variable in C#

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4.00/5 (1 vote)

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Hi All,
I write this code for union and unity of binary variable in C# but when I run it, the console just open and close. what is its problem?

<pre lang="cs">using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
        }
    }
}
public class CBoolOperate
{
    int[] a = null;
    int[] b = null;
    int[] c = null;
    CBoolOperate()//default constructor
    {
    }
    ~CBoolOperate()//default destructor
    {
    }
    public void get()
    {
        Console.WriteLine("please enter first 5 binary digit\n");
        for (int i = 0; i < 5; i++)
        {
            a[i] = Console.Read();
        }
        Console.WriteLine("please enter first 5 binary digit\n");
        for (int i = 0; i < 5; i++)
        {
            b[i] = Console.Read();
        }
    }
    public void union()//A member function
    {
        for (int i = 0; i < 5; i++)
        {
            if (a[i] == 1 || b[i] == 1) c[i] = 1;
            else c[i] = 0;
            Console.WriteLine(c[i]);
        }
        Console.WriteLine("");
    }
    public void and()//A member function
    {
        for (int i = 0; i < 5; i++)
        {
            if (a[i] == 1 && b[i] == 1) c[i] = 1;
            else c[i] = 0;
            Console.WriteLine(c[i]);
        }
        Console.WriteLine("");
    }
    public int main()
    {
        CBoolOperate r=new CBoolOperate();
        r.get();
        r.union();
        r.and();
        return 0;
    }
}

Please help me.

Thanks in Advance.

Posted 12-Jun-11 18:27pm

Member 7904482

Updated 12-Jun-11 19:01pm

Ramalinga Koushik

v2

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2 solutions

Solution 2

This is because your static method Program.Main (which is a real entry point of your program) does nothing. Your probably thought that your other method main is an entry point. No. It is not an entry point of the program; it won't be called.

The default entry point is a static method Main with compatible signature. You can change it in your project's Properties.

By the way: Don't ever write a constructor or destructor which don't do anything. Destructors are almost never used because of Garbage Collector (GC) operation.

—SA

Posted 12-Jun-11 19:07pm

Sergey Alexandrovich Kryukov

Updated 12-Jun-11 19:10pm

v3

Comments

Member 7904482 13-Jun-11 1:12am

can you help me more
I dont understand what you mean

Sergey Alexandrovich Kryukov 13-Jun-11 1:33am

Oh, move your code from "main" to "Program.Main". (Reza did it for you.) You "main" is not the entry point of the program, never called. Better yes, remove class Program, rename "main" to "Main" and rename it to static.

But I would suggest you understand my answer as is. If you don't understand anything, ask me about it. It's important. Entry point is a static function called by the .NET first when it loads the application and tries to run it. Anything else you want me to explain?
--SA

CS2011 13-Jun-11 1:22am

All though you can have more than one main in c# program and you can specify which one you want to use however as you pointed out that was not the case here.But I have one doubt that what difference it make if I use ReadLine(true) or ReadLine();

Sergey Alexandrovich Kryukov 13-Jun-11 1:37am

Here this is not the case, because entry point should be static. OP though "main" is entry point, but real entry point is "Program.Main", which does nothing.

A doubt about ReadLine? (ReadKey, not readling.) See MSDN: ReadKey(true) suppresses echo of the key pressed as we usually want. In this case, the method just blocks the thread until key is pressed -- exactly what is needed in such cases.
--SA

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Reza Mansoori · Accepted Answer · 2011-06-12T19:20:00

Hello dear,
I think you are a beginner in programing
I correct you code and it works well
Because constructor of CBoolOperate was private i make CBoolOperate.main as static , instead it could be

public CBoolOperate()//default constructor
{
}
and 
static void Main(string[] args)
{
    CBoolOperate A = new CBoolOperate();
    A.main();
    Console.ReadLine();
}



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            CBoolOperate.main();
            Console.ReadLine();
        }
    }
}
public class CBoolOperate
{
    int[] a = null;
    int[] b = null;
    int[] c = null;
    CBoolOperate()//default constructor
    {
    }
    ~CBoolOperate()//default destructor
    {
    }
    public void get()
    {
        this.a = new int[5];
        this.b = new int[5];
        this.c = new int[5];
        Console.WriteLine("please enter first 5 binary digit\n");
        for (int i = 0; i < 5; i++)
        {
            a[i] = Convert.ToInt32(Console.ReadLine());
        }
        Console.WriteLine("please enter first 5 binary digit\n");
        for (int i = 0; i < 5; i++)
        {
            b[i] = Convert.ToInt32(Console.ReadLine());
        }
    }
    public void union()//A member function
    {
        Console.WriteLine("result of union for numbers");
        for (int i = 0; i < 5; i++)
        {
            if (a[i] == 1 || b[i] == 1) c[i] = 1;
            else c[i] = 0;
            Console.WriteLine(c[i]);
        }
        Console.WriteLine("");
    }
    public void and()//A member function
    {
        Console.WriteLine("result of and for numbers");
        for (int i = 0; i < 5; i++)
        {
            if (a[i] == 1 && b[i] == 1) c[i] = 1;
            else c[i] = 0;
            Console.WriteLine(c[i]);
        }
        Console.WriteLine("");
    }
    public static int main()
    {
        CBoolOperate r=new CBoolOperate();
        r.get();
        r.union();
        r.and();
        return 0;
    }
}