Saturday, July 26, 2014

C++ Tutorial for Beginners 31 - Operator Overloading in C++









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#include <iostream>
#include<string>
using namespace std;
class Vector {
  public:
    int x,y;
    Vector () {};
    Vector (int a,int b)
    {
        x=a;
        y=b;
    }
    Vector operator+(const Vector&);
};
Vector Vector::operator+(const Vector& parameter){
     Vector temp;
     temp.x=x+ parameter.x;
     temp.y=y+ parameter.y;
     return temp;
}
int main()
{
    Vector vec1(4,2);
    Vector vec2(2,2);
    Vector result;
    result=vec1+vec2;

    cout<<"the result is ("<<result.x<<","<<result.y<<")"<<endl;
    int x=2,y=3;
    int z=x+y;
    return 0;
}




















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Saturday, July 12, 2014

C# MS Access Database Tutorial 1 # Getting Started and Access database C...









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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace AccessLoginApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                OleDbConnection connection = new OleDbConnection();
                connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\dwishika\Documents\Access Database\EmployeeInfo.accdb;
Persist Security Info=False;";
                connection.Open();
                checkConnection.Text = "Connection Successful";
                connection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error  "+ ex);
            }
        }
    }
}












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Tuesday, July 8, 2014

C# Tutorial for Beginners 22 - Properties in C# (How to Define Properti...









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using System;
namespace MyProject.Examples
{
    public class Book
    {
        private int _id;
        private string _bookName;
        private int _noOfPAges=250;
        private string _auther;

  
        public string Auther{get; set;}
            

        public int Id
        {
            set
            {
                if (value < 0)
                    throw new Exception("Id not valid");
                this._id = value;
            }
            get {
                return this._id;
            }
        }
  


        public string BookName
        {
            set
            {
                if (string.IsNullOrEmpty(value))
                    throw new Exception("Book Name not valid or null");
                this._bookName = value;
            }
            get {
                return this._bookName;
            }
        }


        public int NoOfPAge
        {
            get
            {
                return this._noOfPAges;
            }
        }
    }
 

    class ExampleOne
    {
        public static void Main()
        {
         
            Book B1 =new Book();
            B1.Id=10;
            B1.BookName = "The C# Book";
            B1.Auther = "ProgrammingKnowldge";
            Console.WriteLine("The Book Id is {0}", B1.Id);
            Console.WriteLine("The Book Name is {0}", B1.BookName);
            Console.WriteLine("The Book Page is {0}", B1.NoOfPAge);
            Console.WriteLine("The Book Auther is {0}", B1.Auther);
            Console.ReadKey();
        }
    }
}














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Monday, July 7, 2014

C# Tutorial for Beginners 20 - Difference between Method Overriding and ...









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using System;
namespace MyProject.Examples
{
    public class Drawing
    {
        public virtual void Draw()
        {
            Console.WriteLine("This is just a generic drawing class");
        }
    }
    public class line : Drawing
    {
        public override void Draw()
        {
            Console.WriteLine("This is a Line");
        }

       /* public new void Draw()
        {
            Console.WriteLine("This is a Line");
        }*/
    }

    class ExampleOne
    {
        public static void Main()
        {
            Drawing obj = new line();

            Console.ReadKey();
        }
    }
}














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C# Tutorial for Beginners 19 - Polymorphism in C#









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using System;
namespace MyProject.Examples
{
    public class Drawing
    {
        public virtual void Draw()
        {
            Console.WriteLine("This is just a generic drawing object.");
        }
    }
    public class Line : Drawing
    {
        public override void Draw()
        {
            Console.WriteLine("This is a Line.");
        }
    }
    public class Circle : Drawing
    {
        public override void Draw()
        {
            Console.WriteLine("This is a Circle.");
        }
    }
    public class Square : Drawing
    {
        public override void Draw()
        {
            Console.WriteLine("This is a Square.");
        }
    }


    class ExampleOne
    {
        public static void Main()
        {
            Drawing[] dObj = new Drawing[4];
            dObj[0] = new Line();
            dObj[1] = new Circle();
            dObj[2] = new Square();
            dObj[3] = new Drawing();

            foreach (Drawing draw in dObj)
            {
                draw.Draw();
            }
            Console.ReadKey();
        }
    }
}
























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Thursday, July 3, 2014

C# Tutorial for Beginners 18 - Method Hiding in C#











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using System;
namespace MyProject.Examples
{
    class FC
    {
        public void Display()
        {
            System.Console.WriteLine("FC::Display");
        }
    }
    class SC : FC
    {
        public new void Display()
        {
            //base.Display();
            System.Console.WriteLine("SC::Display");
        }
    }
    class TC : SC
    {
        public new void Display()
        {
            //base.Display();
            System.Console.WriteLine("TC::Display");
        }
    }
    class ExampleOne
    {
        public static void Main()
        {
            TC obj = new TC();
           // SC obj = new FC();
           // ((FC)obj).Display();
            obj.Display();

           
            Console.ReadKey();
        }
    }
}




















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C# Tutorial for Beginners 17 - Class Inheritance in C#









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using System;
namespace MyProject.Examples
{
    class Polygon {
        public Polygon()
        {
            Console.WriteLine("We are in Base class");
        }
        public int width, height;
        public void setVlues(int a, int b)
        {
            this.width=a;
            this.height=b;
        }
    }

    class Rectangle : Polygon
    {
        public Rectangle()
        {
            Console.WriteLine("We are in Derived Rectaange class");
        }
        public int area() {
            return width * height;
        }
    }
    class Triangle : Polygon
    {
        public int area()
        {
            return width * height/2;
        }
    }
    class ExampleOne
    {
        public static void Main()
        {
            Rectangle rect = new Rectangle();
            Triangle trig = new Triangle();
            rect.setVlues(10,20);
            trig.setVlues(30,20);

            Console.WriteLine("Rectangle area = {0}", rect.area());
            Console.WriteLine("Triangle area = {0}", trig.area());
            Console.ReadKey();
        }
    }
}




































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