Understanding "USING" keyword in c# programming

The keyword USING is similar to #INCLUDE in c programming to add the namespaces into the program which we are going to execute. We can write programs without using this keyword too. The bellow two example show how the code is changed with and without including the "USING" keyword in the program.

The program with "USING" keyword:

---

using System;
class SimpleHelloWorld
{
    static void Main()
    {
        Console.WriteLine("Hello World!");
    }
}

---

The program without "USING" keyword:

---

class WithoutUsing
{
    static void Main()
    {
        System.Console.WriteLine("Hello World!");
    }
}

---

Simple Hello World Program

The program is as follows:

---

using System;
class SimpleHelloWorld
{
    static void Main()
    {
        Console.WriteLine("Hello World!");
    }
}

---

The output is as follows:

Creating a Sample WPF Application in Visual Studio 2015 using Visual Basic WPF

What is WPF(Windows Presentation Foundation) application?

It is a graphical subsystem in windows to render user interface in windows-based applications. WPF works on the base of DirectX which is a set of API's.  


1.Open visual studio 2015 and create a new WPF application with the name Hello:

2.Create two radio buttons:

         To create radio button double click on Radio Button control in toolbox. If the toolbox is hidden, select view menu and click on toolbox (or) use a shortcut "Ctrl+Alt+X".  You can create a radio button on double clicking on radio button which is listed in "Common Wpf Controls".

3.Again create another radio button. And place them by dragging. After dragging and placing both the radio buttons the main window will appear like this.

4.The names behind the radio buttons is "RadioButton" by default. The name of the button can be changed as per our requirement of its use in the application. To change the name of radiobutton select the radiobutton to access the properties of it. And then edit the name in "Content Property" as shown in the figure below.

5.Select each radio button and change the font size and its style as shown in the figure below.

6.Then add a button into the main window by double clicking on the "Button" in the toolbox window. And then change its name is "Display". Adjust the size of the button to look apt to the window size.

7.Double click on the "Display Button" to write the code. The code is about to generate a message box when you click the button in the main window. The message box display different messages based on the selection of hello and goodbye radio buttons. The code is as follows:

---

Class MainWindow
    Private Sub button_Click(sender As Object, e As RoutedEventArgs) Handles button.Click
        If radioButton.IsChecked = True Then
            MessageBox.Show("Hello")
        Else radiobutton.IsChecked = True
            MessageBox.Show("GoodBye")
        End If
    End Sub
End Class

---

Then click debug to run the application. 

How to change the color theme into dark in visual studio 2015

Steps:-

1.First open the visual studio 2015.
2.Select the Tools on the Menu bar.
3.Select Options

4.After selecting the options in the tools menu.

5.In the option window Change the color theme into Dark.

6.Set the color theme into dark and click OK.

You can follow the above steps with the below images.

1.First open the visual studio 2015.

2.Select the Tools on the Menu bar.

3.Select Options

4.After selecting the options in the tools menu.

5.In the option window Change the color theme into Dark.

6.Set the color theme into dark and click OK.

7.After changing the color theme you can view the visual studio like this.

Finding the given number is Armstrong number or not using C programming(c programming examples)(c program examples)

If you want to see this code with a perfect indentation, copy the code into "sublime text editor" and make sure that the type of code is set to 'c' at the bottom right of the window. After pasting the code press the command "ctrl+shift+P", you get a search box. Type "indentation" you get an option like this below the search box "Indentation: Reindent lines". Clink on that to get the code with indentation.(c programming examples)

The program is as follows:

---

#include <stdio.h>

main()

{

 int num, i, sum=0, cube;

 printf("enter the number to verify is it armstrong or not\n");

 scanf("%d", &num);

 i=num;

 while(num>0)

 {

  cube=(num%10)*(num%10)*(num%10);

  sum=sum+cube;

  num=num/10;

 }

 if(num!=0)

  sum=sum+(num*num*num);

 if (sum==i)

  printf("the entered number is armstrong number\n");

 else

  printf("the entered number is not armstrong number\n");

return 0;

}

The output is as follows:

C is a general-purpose programming language. It has been closely associated with the UNIX system where is was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine; and although it has been called a “system programming language” because it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.(c programming examples)(c program examples)

Many of the important ideas of C stem from the language BCPL, developed by Martin Richards. The influence of BCPL on C proceeded indirectly through the language B, which was written by Ken Thompson in 1970 for the first UNIX system on the DEC PDP-7.(c programming examples)

BCPL and B are “typeless” languages. By contrast, C provides a variety of data types. The fundamental types are characters, and integers and floating point numbers of several sizes. In addition, there is a hierarchy of derived data types created with pointers, arrays, structures, and unions. Expressions are formed from operators and operands; any expression, including an assignment or a function call, can be a statement. Pointers provide for machine-independent address arithmetic.(c programming examples)(c program examples)

C provides the fundamental control-flow constructions required for well-structured programs: statement grouping, decision making (if-else), selecting one of a set of possible cases (switch), looping with the termination test at the top (while, for) or at the bottom (do), and early loop exit (break).(c programming examples)(c program examples)

Functions may return values of basic types, structures, unions, or pointers. Any function may be called recursively. Local variables are typically “automatic,” or created anew with each invocation. Function definitions may not be nested but variables may be declared in a block-structured fashion. The functions of a C program may exist I separate source files that are compiled separately. Variables may be internal to a function, external but know only within a single source file, or visible to the entire program.(c programming examples)(c program examples)

A preprocessing step performs macro substitution on program text, inclusion of other source files, conditional compilation.(c programming examples)(c program examples)

C  is a relatively “low level” language. This characterization is not pejorative; it simply means that C deals with the same sort of object that most computers do, namely characters, numbers, and addresses. These may be combined and moved about with the arithmetic and logical operators implemented by real machines.(c programming examples)(c program examples)

C provides no operations to deal directly with composite objects such as character strings, sets, lists, or arrays. There are no operations that manipulate an entire array or string, although structures may be copied as a unit. The language does not define any storage allocation facility other than static definition and the stack discipline provided by the local variables of functions; there is n heap or garbage collection. Finally, C itself provides no input/output facilities; there are no READ or WRITE statements, and no built-in file access methods. All of these higher-level mechanisms must be provided by explicitly called functions. Most C implementations have included a reasonably standard collection of such functions.(c programming examples)(c program examples)

next post:
Finding the list of Armstrong numbers upto given input number using C programming

---

Finding the list of Armstrong numbers upto given input number using C programming(c programming examples)(c program examples)

If you want to see this code with a perfect indentation, copy the code into "sublime text editor" and make sure that the type of code is set to 'c' at the bottom right of the window. After pasting the code press the command "ctrl+shift+P", you get a search box. Type "indentation" you get an option like this below the search box "Indentation: Reindent lines". Clink on that to get the code with indentation.

The program is as follows:

#include <stdio.h>

main()

{

 int num, i, sum=0, cube, upto;

 printf("enter the number upto which u need tha armstrong numbers list\n");

 scanf("%d", &upto);

 i=num=1;

 printf("the list of armstrong numbers are:\n");

 printf("%d\t", 0 );

 while(i<=upto)

 {

  sum=0;

 while(num>0)

 {

  cube=(num%10)*(num%10)*(num%10);

  sum=sum+cube;

  num=num/10;

 }

 if(num!=0)

  sum=sum+(num*num*num);

 if (sum==i)

  printf("%d\t", i);

 i++;

 num=i;

 }

return 0;

}

The output is as follows:

C is a general-purpose programming language. It has been closely associated with the UNIX system where is was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine; and although it has been called a “system programming language” because it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.(c programming examples)(c program examples)

Many of the important ideas of C stem from the language BCPL, developed by Martin Richards. The influence of BCPL on C proceeded indirectly through the language B, which was written by Ken Thompson in 1970 for the first UNIX system on the DEC PDP-7.(c programming examples)

BCPL and B are “typeless” languages. By contrast, C provides a variety of data types. The fundamental types are characters, and integers and floating point numbers of several sizes. In addition, there is a hierarchy of derived data types created with pointers, arrays, structures, and unions. Expressions are formed from operators and operands; any expression, including an assignment or a function call, can be a statement. Pointers provide for machine-independent address arithmetic.(c programming examples)(c program examples)

C provides the fundamental control-flow constructions required for well-structured programs: statement grouping, decision making (if-else), selecting one of a set of possible cases (switch), looping with the termination test at the top (while, for) or at the bottom (do), and early loop exit (break).(c programming examples)(c program examples)

Functions may return values of basic types, structures, unions, or pointers. Any function may be called recursively. Local variables are typically “automatic,” or created anew with each invocation. Function definitions may not be nested but variables may be declared in a block-structured fashion. The functions of a C program may exist I separate source files that are compiled separately. Variables may be internal to a function, external but know only within a single source file, or visible to the entire program.(c programming examples)(c program examples)

A preprocessing step performs macro substitution on program text, inclusion of other source files, conditional compilation.(c programming examples)(c program examples)

C  is a relatively “low level” language. This characterization is not pejorative; it simply means that C deals with the same sort of object that most computers do, namely characters, numbers, and addresses. These may be combined and moved about with the arithmetic and logical operators implemented by real machines.(c programming examples)(c program examples)

C provides no operations to deal directly with composite objects such as character strings, sets, lists, or arrays. There are no operations that manipulate an entire array or string, although structures may be copied as a unit. The language does not define any storage allocation facility other than static definition and the stack discipline provided by the local variables of functions; there is n heap or garbage collection. Finally, C itself provides no input/output facilities; there are no READ or WRITE statements, and no built-in file access methods. All of these higher-level mechanisms must be provided by explicitly called functions. Most C implementations have included a reasonably standard collection of such functions.(c programming examples)(c program examples)

next post:
Finding the given number is perfect or not using C programming

Finding the given number is perfect or not using C programming(c programming examples)(c program examples)

If you want to see this code with a perfect indentation, copy the code into "sublime text editor" and make sure that the type of code is set to 'c' at the bottom right of the window. After pasting the code press the command "ctrl+shift+P", you get a search box. Type "indentation" you get an option like this below the search box "Indentation: Reindent lines". Clink on that to get the code with indentation.

The program is as follows:

#include <stdio.h>

main()

{

 int num, i=1, sum=0;

 printf("enter the number to find is it perfect or not?\n");

 scanf("%d",&num);

 while(i<num)

 {

  if(num%i==0)

   sum=sum+i;

  i++;

 }

 if (num==sum)

  printf("the given number is a perfect number\n");

 else

  printf("the given number is not a perfect number\n");

return 0;

}

The output is as follows:

C is a general-purpose programming language. It has been closely associated with the UNIX system where is was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine; and although it has been called a “system programming language” because it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.(c programming examples)(c program examples)

Many of the important ideas of C stem from the language BCPL, developed by Martin Richards. The influence of BCPL on C proceeded indirectly through the language B, which was written by Ken Thompson in 1970 for the first UNIX system on the DEC PDP-7.(c programming examples)

BCPL and B are “typeless” languages. By contrast, C provides a variety of data types. The fundamental types are characters, and integers and floating point numbers of several sizes. In addition, there is a hierarchy of derived data types created with pointers, arrays, structures, and unions. Expressions are formed from operators and operands; any expression, including an assignment or a function call, can be a statement. Pointers provide for machine-independent address arithmetic.(c programming examples)(c program examples)

C provides the fundamental control-flow constructions required for well-structured programs: statement grouping, decision making (if-else), selecting one of a set of possible cases (switch), looping with the termination test at the top (while, for) or at the bottom (do), and early loop exit (break).(c programming examples)(c program examples)

Functions may return values of basic types, structures, unions, or pointers. Any function may be called recursively. Local variables are typically “automatic,” or created anew with each invocation. Function definitions may not be nested but variables may be declared in a block-structured fashion. The functions of a C program may exist I separate source files that are compiled separately. Variables may be internal to a function, external but know only within a single source file, or visible to the entire program.(c programming examples)(c program examples)

A preprocessing step performs macro substitution on program text, inclusion of other source files, conditional compilation.(c programming examples)(c program examples)

C  is a relatively “low level” language. This characterization is not pejorative; it simply means that C deals with the same sort of object that most computers do, namely characters, numbers, and addresses. These may be combined and moved about with the arithmetic and logical operators implemented by real machines.(c programming examples)(c program examples)

C provides no operations to deal directly with composite objects such as character strings, sets, lists, or arrays. There are no operations that manipulate an entire array or string, although structures may be copied as a unit. The language does not define any storage allocation facility other than static definition and the stack discipline provided by the local variables of functions; there is n heap or garbage collection. Finally, C itself provides no input/output facilities; there are no READ or WRITE statements, and no built-in file access methods. All of these higher-level mechanisms must be provided by explicitly called functions. Most C implementations have included a reasonably standard collection of such functions.(c programming examples)(c program examples)

next post:
Finding the list of perfect numbers upto a certain limit using C programming

Finding the list of perfect numbers upto a certain limit using C programming(c programming examples)(c program examples)

If you want to see this code with a perfect indentation, copy the code into "sublime text editor" and make sure that the type of code is set to 'c' at the bottom right of the window. After pasting the code press the command "ctrl+shift+P", you get a search box. Type "indentation" you get an option like this below the search box "Indentation: Reindent lines". Clink on that to get the code with indentation.

The program is as follows:

#include <stdio.h>

main()

{

 int num=1, i, sum, upto;

 printf("enter the limit upto which, u need the list of perfect numbes:\n");

 scanf("%d",&upto);

 printf("the list of perfect numbers are:\n");

 while(num<=upto)

 {

  i=1;

  sum=0;

  while(i<num)

  {

   if(num%i==0)

    sum=sum+i;

   i++;

  }

 if (num==sum)

  printf("%d\t", num);

 num++;

 }

return 0;

}

The output is as follows:

C is a general-purpose programming language. It has been closely associated with the UNIX system where is was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine; and although it has been called a “system programming language” because it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.(c programming examples)(c program examples)

Many of the important ideas of C stem from the language BCPL, developed by Martin Richards. The influence of BCPL on C proceeded indirectly through the language B, which was written by Ken Thompson in 1970 for the first UNIX system on the DEC PDP-7.(c programming examples)

BCPL and B are “typeless” languages. By contrast, C provides a variety of data types. The fundamental types are characters, and integers and floating point numbers of several sizes. In addition, there is a hierarchy of derived data types created with pointers, arrays, structures, and unions. Expressions are formed from operators and operands; any expression, including an assignment or a function call, can be a statement. Pointers provide for machine-independent address arithmetic.(c programming examples)(c program examples)

C provides the fundamental control-flow constructions required for well-structured programs: statement grouping, decision making (if-else), selecting one of a set of possible cases (switch), looping with the termination test at the top (while, for) or at the bottom (do), and early loop exit (break).(c programming examples)(c program examples)

Functions may return values of basic types, structures, unions, or pointers. Any function may be called recursively. Local variables are typically “automatic,” or created anew with each invocation. Function definitions may not be nested but variables may be declared in a block-structured fashion. The functions of a C program may exist I separate source files that are compiled separately. Variables may be internal to a function, external but know only within a single source file, or visible to the entire program.(c programming examples)(c program examples)

A preprocessing step performs macro substitution on program text, inclusion of other source files, conditional compilation.(c programming examples)(c program examples)

C  is a relatively “low level” language. This characterization is not pejorative; it simply means that C deals with the same sort of object that most computers do, namely characters, numbers, and addresses. These may be combined and moved about with the arithmetic and logical operators implemented by real machines.(c programming examples)(c program examples)

C provides no operations to deal directly with composite objects such as character strings, sets, lists, or arrays. There are no operations that manipulate an entire array or string, although structures may be copied as a unit. The language does not define any storage allocation facility other than static definition and the stack discipline provided by the local variables of functions; there is n heap or garbage collection. Finally, C itself provides no input/output facilities; there are no READ or WRITE statements, and no built-in file access methods. All of these higher-level mechanisms must be provided by explicitly called functions. Most C implementations have included a reasonably standard collection of such functions.(c programming examples)(c program examples)

next post:
Finding all prime numbers upto a certain limit using C programming

Finding all prime numbers upto a certain limit using C programming(c programming examples)(c program examples)

If you want to see this code with a perfect indentation, copy the code into "sublime text editor" and make sure that the type of code is set to 'c' at the bottom right of the window. After pasting the code press the command "ctrl+shift+P", you get a search box. Type "indentation" you get an option like this below the search box "Indentation: Reindent lines". Clink on that to get the code with indentation.

The program is as follows:

#include <stdio.h>

main()

{

 int num=2, i, upto, fact;

 printf("enter the number upto which u want to get all prime numbers:\n");

 scanf("%d", &upto);

 printf("the list of prime numbers are:\n");

 while(num<=upto)

 {

  i=1;fact=0;

  while(i<=num)

  {

   if(num%i==0)

    fact++;

   i++;

  }

  if(fact==2)

   printf("%d\t",num );

  num++;

 }

return 0;

}

The output is as follows:

C is a general-purpose programming language. It has been closely associated with the UNIX system where is was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine; and although it has been called a “system programming language” because it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.(c programming examples)(c program examples)

Many of the important ideas of C stem from the language BCPL, developed by Martin Richards. The influence of BCPL on C proceeded indirectly through the language B, which was written by Ken Thompson in 1970 for the first UNIX system on the DEC PDP-7.(c programming examples)

BCPL and B are “typeless” languages. By contrast, C provides a variety of data types. The fundamental types are characters, and integers and floating point numbers of several sizes. In addition, there is a hierarchy of derived data types created with pointers, arrays, structures, and unions. Expressions are formed from operators and operands; any expression, including an assignment or a function call, can be a statement. Pointers provide for machine-independent address arithmetic.(c programming examples)(c program examples)

C provides the fundamental control-flow constructions required for well-structured programs: statement grouping, decision making (if-else), selecting one of a set of possible cases (switch), looping with the termination test at the top (while, for) or at the bottom (do), and early loop exit (break).(c programming examples)(c program examples)

Functions may return values of basic types, structures, unions, or pointers. Any function may be called recursively. Local variables are typically “automatic,” or created anew with each invocation. Function definitions may not be nested but variables may be declared in a block-structured fashion. The functions of a C program may exist I separate source files that are compiled separately. Variables may be internal to a function, external but know only within a single source file, or visible to the entire program.(c programming examples)(c program examples)

A preprocessing step performs macro substitution on program text, inclusion of other source files, conditional compilation.(c programming examples)(c program examples)

C  is a relatively “low level” language. This characterization is not pejorative; it simply means that C deals with the same sort of object that most computers do, namely characters, numbers, and addresses. These may be combined and moved about with the arithmetic and logical operators implemented by real machines.(c programming examples)(c program examples)

C provides no operations to deal directly with composite objects such as character strings, sets, lists, or arrays. There are no operations that manipulate an entire array or string, although structures may be copied as a unit. The language does not define any storage allocation facility other than static definition and the stack discipline provided by the local variables of functions; there is n heap or garbage collection. Finally, C itself provides no input/output facilities; there are no READ or WRITE statements, and no built-in file access methods. All of these higher-level mechanisms must be provided by explicitly called functions. Most C implementations have included a reasonably standard collection of such functions.(c programming examples)(c program examples)

next post:
Printing fibonacci series using C programming