Monday, October 13, 2014

C++ Tutorial for Beginners 42 -Create a Text File and Write in It 













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///ofstream: Stream class to write on files
///ifstream: Stream class to read from files
///fstream: Stream class to both read and write from/to files.
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
  ofstream file_("mytext.txt");
 // file_.open("mytext.txt");
  if(file_.is_open()){
  file_ << "this is my first text file 1 \n";
  file_ << "this is my first text file 2 \n";
  file_ << "this is my first text file 3 \n";
  file_ << "this is my first text file 4 \n";
  file_.close();
  }

  std::cin.get();
  return 0;
}














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Wednesday, October 8, 2014

Python Tutorial for Beginners 16 - Class Constructors (__init__) and Des... 













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class Person:
    def __init__(self,id):
        self.id=id
        print("Our class is created")
    def __del__(self):
        print (self.id," Our class object is destroyed")
    def setFullName(self,firstName,lastName):
        self.firstName=firstName
        self.lastName=lastName
    def prinfFullName(self):
        print(self.firstName," ",self.lastName)

personName=Person(5)
personName.setFullName("programming","Knowledge")
personName.prinfFullName()
personName.__del__()












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Saturday, September 20, 2014

C++ Tutorial for Beginners 37 - C++ Exception Handling (Try Throw Catch) 















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#include <iostream>
#include<string>
#include <exception>
using namespace std;

int main()
{
 try{
   std::cout<<"Please enter age"<<std::endl;
   int age=0;
   std::cin>>age;
   if(age>100 || age<0)
   {
       throw 'a';
   }
 }
 catch(int e)
 {
     std::cout<<"Error No="<<e<<std::endl;
 }
  catch(char e)
 {
     std::cout<<"Error Char="<<e<<std::endl;
 }
  catch(...)
 {
     std::cout<<"Unknown Exception"<<std::endl;
 }
}












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Saturday, September 13, 2014

C++ Tutorial for Beginners 35 - Introduction to Polymorphism in C++ 




















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#include <iostream>
#include<string>
using namespace std;
class shape
{
   public:
    void setValues(int a ,int b){
     width=a;
     height=b;
    }
    protected:
    int height ;
    int width;
};
class rectangle : public shape
{
   public:
       int area(){
         return (height * width);
       }
};
class triangle : public shape
{
   public:
       int area(){
         return (height * width/2);
       }
};

int main()
{
    rectangle rec;
    triangle tri;
    shape *poly1=&rec;
    shape *poly2=&tri;
    poly1->setValues(10,20);
    poly2->setValues(10,20);

    std::cout<<rec.area()<<std::endl;
    std::cout<<tri.area()<<std::endl;
}












-------------------------------------------------------

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C++ Tutorial for Beginners 35 - Introduction to Polymorphism in C++ 




















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#include <iostream>
#include<string>
using namespace std;
class shape
{
   public:
    void setValues(int a ,int b){
     width=a;
     height=b;
    }
    protected:
    int height ;
    int width;
};
class rectangle : public shape
{
   public:
       int area(){
         return (height * width);
       }
};
class triangle : public shape
{
   public:
       int area(){
         return (height * width/2);
       }
};

int main()
{
    rectangle rec;
    triangle tri;
    shape *poly1=&rec;
    shape *poly2=&tri;
    poly1->setValues(10,20);
    poly2->setValues(10,20);

    std::cout<<rec.area()<<std::endl;
    std::cout<<tri.area()<<std::endl;
}












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Tuesday, August 26, 2014

C++ Tutorial for Beginners 33 - C++ Multiple Inheritance 







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#include <iostream>
#include<string>
using namespace std;
///polygon // rectangle square triangle "is a " Animal dog cat
class shape
{
   public:
    void setValues(int a ,int b){
     width=a;
     height=b;
    }
    protected:
    int height ;
    int width;
};
class description
{
public:
   void print(string description_)
   {
     std::cout<<"We are using "<<description_<<" Class"<<std::endl;
   }
};
class rectangle : public shape ,public description
{
   public:
       int area(){
         return (height * width);
       }
};

int main()
{
   rectangle rec;
   rec.setValues(15,10);
   std::cout<<"area Rectangle= "<<rec.area()<<std::endl;

   rec.print("Rectangle");
}


















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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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