Category Archives: C#

C#. Param modificators and overload

Posted on 21.08.2017 by Stanislav_Panteleev

123

// out modificator
        private void Add1(int x, int y, out int r)
        {

            //do something
            r = x + y; //out param must be assigned inside scope

        }

        // ref modificator
        int r = 123;
        private static void Add2(int x, int y, ref int r)
        {

            //do something
            r = x + y; //out param must be assigned inside scope

        }


        // params modificator - must be 1 by order
        private static double CalcAverage(params double[] values) {

            double r = 0;
            if (values.Length == 0) return r;

            double sum = 0;
            for (var i = 0; i < values.Length; i++) { sum += values[i]; }
            r = sum / values.Length;
            return r;

        }

        // optional Arguments
        private static void OptionalArgument(string s1,string s2="default") {
            Console.WriteLine(s1+"\n\r"+s2);
        }


        // overload
        static void Some(int x, int y) { }
        static void Some(int x, int y, int z) { }

// out modificator

private void Add1(int x, int y, out int r)

{

//do something

r = x + y; //out param must be assigned inside scope

}

// ref modificator

int r = 123;

private static void Add2(int x, int y, ref int r)

{

//do something

r = x + y; //out param must be assigned inside scope

}

// params modificator - must be 1 by order

private static double CalcAverage(params double[] values) {

double r = 0;

if (values.Length == 0) return r;

double sum = 0;

for (var i = 0; i < values.Length; i++) { sum += values[i]; }

r = sum / values.Length;

return r;

}

// optional Arguments

private static void OptionalArgument(string s1,string s2="default") {

Console.WriteLine(s1+"\n\r"+s2);

}

// overload

static void Some(int x, int y) { }

static void Some(int x, int y, int z) { }

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С#. Some remarks alltogether

Posted on 21.08.2017 by Stanislav_Panteleev

123

using System;
using System.Text;



namespace Mains
{
    class Program
    {
        static int Main(string[] args)
        {

            //--- reading args of main
            for (int i = 0; i < args.Length; i++) { Console.WriteLine("Arg: {0}", args[i]); }

            // or 

            foreach (string arg in args) Console.WriteLine("Arg: {0},{1}", arg, 123);

            //or System.Enviroment

            Console.WriteLine("True {0}", bool.TrueString);

            //--- char
            char myChar = 'a';
            if (char.IsDigit(myChar)) { Console.WriteLine("digit"); }

            //--- parse from string
            bool b = bool.Parse("true");

            //--- dateTime
            DateTime dt = new DateTime(2017, 08, 20);
            Console.WriteLine(dt.DayOfWeek);

            string s = "someString";
            if (s.Contains("some")) {/*do something*/ }
            Console.Write("beep\a\n\r");
            Console.WriteLine("beep\a\n\r");

            //--- verabtim strings
            Console.Write(@"some\Dir\"); // will

            // string builder using System.Text

            StringBuilder sb = new StringBuilder();
            sb.Append("\n");
            sb.AppendLine("Line1");
            sb.AppendLine("Line2");
            sb.AppendLine("Line3");
            Console.WriteLine(sb.ToString());

            // Convert
            byte myByte = 0;
            int myInt = 200;

            myByte = Convert.ToByte(myInt);
            Console.WriteLine("Value of my Byte {0}", myByte);


            //----- narrowing and checked directive
            short myShort;
            int myInt1 = 100000000;

            // myShort = myInt1; // Severity	Code	Description	Project	File	Line	Suppression State
            //Error CS0266  Cannot implicitly convert type 'int' to 'short'.An explicit conversion exists (are you missing a cast?)    Mains C:\C#\MyC#StudyProjects\07_DifferentMains\Mains\Mains\Program.cs	64	Active

            try


            { checked { myShort = (short)myInt1; } }
            //{ checked { myShort = Convert.ToUInt16(myInt1); } } 


            catch (OverflowException ex)
            { Console.WriteLine(ex.Message); }


            //----- var directive
            var myInt2 = 0;
            var myBool = true;
            var myString = "string";

            Console.WriteLine(myInt2.GetType().Name);
            Console.WriteLine(myBool.GetType().Name);
            Console.WriteLine(myString.GetType().Name);

            // for
            for (var i = 0; i < 10; i++) { /*do something*/}

            //foreach
            int[] intArray = { 0, 1, 2, 3 };
            foreach (var i in intArray) { /*do something*/}

            //while
            var j = 0;
            while (j < 10) { j++; }

            //do while
            do { j++; } while (j < 10);

            // if else

            if (j < 10) { }
            else if (j == 10) { }
            else if (j == 1) { };

            // and or not && || !
            if ( (j<=10)  && (j>=11) ){ }
            if ((j <= 10) || (j >= 12)) { }
            if ((j != 12) || (j >= 12)) { }

            //switch

            var n = 12;

            switch (n) {

                case 1: { };break;
                case 2: { };break;
                default: { };break;

            }











            //----------
            Console.ReadLine();
            return -1;

            }
    }
}

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using System;

using System.Text;

namespace Mains

{

class Program

{

static int Main(string[] args)

{

//--- reading args of main

for (int i = 0; i < args.Length; i++) { Console.WriteLine("Arg: {0}", args[i]); }

// or

foreach (string arg in args) Console.WriteLine("Arg: {0},{1}", arg, 123);

//or System.Enviroment

Console.WriteLine("True {0}", bool.TrueString);

//--- char

char myChar = 'a';

if (char.IsDigit(myChar)) { Console.WriteLine("digit"); }

//--- parse from string

bool b = bool.Parse("true");

//--- dateTime

DateTime dt = new DateTime(2017, 08, 20);

Console.WriteLine(dt.DayOfWeek);

string s = "someString";

if (s.Contains("some")) {/*do something*/ }

Console.Write("beep\a\n\r");

Console.WriteLine("beep\a\n\r");

//--- verabtim strings

Console.Write(@"some\Dir\"); // will

// string builder using System.Text

StringBuilder sb = new StringBuilder();

sb.Append("\n");

sb.AppendLine("Line1");

sb.AppendLine("Line2");

sb.AppendLine("Line3");

Console.WriteLine(sb.ToString());

// Convert

byte myByte = 0;

int myInt = 200;

myByte = Convert.ToByte(myInt);

Console.WriteLine("Value of my Byte {0}", myByte);

//----- narrowing and checked directive

short myShort;

int myInt1 = 100000000;

// myShort = myInt1; // Severity Code Description Project File Line Suppression State

//Error CS0266 Cannot implicitly convert type 'int' to 'short'.An explicit conversion exists (are you missing a cast?) Mains C:\C#\MyC#StudyProjects\07_DifferentMains\Mains\Mains\Program.cs 64 Active

try

{ checked { myShort = (short)myInt1; } }

//{ checked { myShort = Convert.ToUInt16(myInt1); } }

catch (OverflowException ex)

{ Console.WriteLine(ex.Message); }

//----- var directive

var myInt2 = 0;

var myBool = true;

var myString = "string";

Console.WriteLine(myInt2.GetType().Name);

Console.WriteLine(myBool.GetType().Name);

Console.WriteLine(myString.GetType().Name);

// for

for (var i = 0; i < 10; i++) { /*do something*/}

//foreach

int[] intArray = { 0, 1, 2, 3 };

foreach (var i in intArray) { /*do something*/}

//while

var j = 0;

while (j < 10) { j++; }

//do while

do { j++; } while (j < 10);

// if else

if (j < 10) { }

else if (j == 10) { }

else if (j == 1) { };

// and or not && || !

if ( (j<=10) && (j>=11) ){ }

if ((j <= 10) || (j >= 12)) { }

if ((j != 12) || (j >= 12)) { }

//switch

var n = 12;

switch (n) {

case 1: { };break;

case 2: { };break;

default: { };break;

}

//----------

Console.ReadLine();

return -1;

}

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C#. Value types, Reference types, Object types, String Types, Dynamic Types, Pointer Type

Posted on 21.08.2017 by Stanislav_Panteleev

Source The variables in C#, are categorized into the following types: Value types Reference types : object type, string type…. Pointer types Value Type Value type variables can be assigned a value directly. They are derived from the class System.ValueType. The … Continue reading →

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C#.Processings with args of command line

Posted on 21.08.2017 by Stanislav_Panteleev

example

       static int Main( string[] args)
        {

            for (int i = 0; i < args.Length; i++) { Console.WriteLine("Arg: {0}", args[i]); }            

            // or 

            foreach (string arg in args) Console.WriteLine("Arg: {0}", arg);

            return -1;

        }

static int Main( string[] args)

{

for (int i = 0; i < args.Length; i++) { Console.WriteLine("Arg: {0}", args[i]); }

// or

foreach (string arg in args) Console.WriteLine("Arg: {0}", arg);

return -1;

}

for testing in visual studio Solution Explorer > Debug > Command line Arguments

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C#. Different variants of method Main

Posted on 21.08.2017 by Stanislav_Panteleev

returns int and has strings array as arg 1. Returning Main with args

    class Program
    {
        static int Main(string[] args)
        {
            return 0;
        }
    }

class Program

{

static int Main(string[] args)

{

return 0;

}

2. Returning Main without args

   class Program
    {
        static int Main()
        {
            return 0;
        }
    }

class Program

{

static int Main()

{

return 0;

}

3. Void Main with args

    class Program
    {
        static void Main(string[] args)
        {
           
        }
    }

class Program

{

static void Main(string[] args)

{

}

4. Void Main without args

    class Program
    {
        static void Main(string[] args)
        {
           
        }
    }

class Program

{

static void Main(string[] args)

{

}

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Алгоритмы. Delphi. C#. PHP. JS. Бинарный поиск в массивах на 4 языках

Posted on 25.01.2017 by Stanislav_Panteleev

Продолжаем мультиязычные посты. Сегодня бинарный поиск. Все программы будут состоять из 2 частей – рандомное заполнение массивов с сортировкой. И вторая часть – собственно бинарный поиск. Delphi (бинарный поиск) Собственно реализация Функции бинарного поиска Integer и String массивов. Массивы предварительно … Continue reading →

Posted in C#, Delphi, javascript, PHP | Comments Off

C#. Создание и инициализация массивов

Posted on 13.01.2017 by Stanislav_Panteleev

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ArrayExamples
{
    public partial class fArrayExamples : Form
    {
        public fArrayExamples()
        {
            InitializeComponent();
        }


        private void createArray_way1_Click(object sender, EventArgs e)
        {

            // Create and initialization of array of 3 elements way 1

            int[] someIntArray = new int[3];

            someIntArray[0] = 1;
            someIntArray[1] = 2;
            someIntArray[2] = 3;

            textBox.Text += "Create and initialization of array of 3 elements way 1" + Environment.NewLine + "";

            textBox.Text += Environment.NewLine +
                            "   someIntArray[1]=" + someIntArray[0].ToString() + Environment.NewLine +
                            "   someIntArray[2]=" + someIntArray[1].ToString() + Environment.NewLine +
                            "   someIntArray[3]=" + someIntArray[2].ToString() + Environment.NewLine;


        }


        private void createArray_way2_Click(object sender, EventArgs e)
        {

            textBox.Text += Environment.NewLine;

            // Create and initialization of array of 3 elements way 2

            textBox.Text += "Create and initialization of array of 3 elements way 2" + Environment.NewLine+"";

            int[] someIntArray2 = { 1, 2, 3 };

            textBox.Text += Environment.NewLine +
                            "   someIntArray[1]=" + someIntArray2[0].ToString() + Environment.NewLine +
                            "   someIntArray[2]=" + someIntArray2[1].ToString() + Environment.NewLine +
                            "   someIntArray[3]=" + someIntArray2[2].ToString() + Environment.NewLine;

        }

        private void create3DimensionalArray_Click(object sender, EventArgs e)
        {

            textBox.Text += Environment.NewLine;

            int[,,] some3DArray = new int[1, 1, 1];

            textBox.Text += "Create and initialization of 3 dimensional array" + Environment.NewLine + "";



            textBox.Text += Environment.NewLine +
                            "   some3DArray[0,0,0]=" + some3DArray[0, 0, 0].ToString() + Environment.NewLine;
                            

        }

        
    }
}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace ArrayExamples

{

public partial class fArrayExamples : Form

{

public fArrayExamples()

{

InitializeComponent();

}

private void createArray_way1_Click(object sender, EventArgs e)

{

// Create and initialization of array of 3 elements way 1

int[] someIntArray = new int[3];

someIntArray[0] = 1;

someIntArray[1] = 2;

someIntArray[2] = 3;

textBox.Text += "Create and initialization of array of 3 elements way 1" + Environment.NewLine + "";

textBox.Text += Environment.NewLine +

" someIntArray[1]=" + someIntArray[0].ToString() + Environment.NewLine +

" someIntArray[2]=" + someIntArray[1].ToString() + Environment.NewLine +

" someIntArray[3]=" + someIntArray[2].ToString() + Environment.NewLine;

}

private void createArray_way2_Click(object sender, EventArgs e)

{

textBox.Text += Environment.NewLine;

// Create and initialization of array of 3 elements way 2

textBox.Text += "Create and initialization of array of 3 elements way 2" + Environment.NewLine+"";

int[] someIntArray2 = { 1, 2, 3 };

textBox.Text += Environment.NewLine +

" someIntArray[1]=" + someIntArray2[0].ToString() + Environment.NewLine +

" someIntArray[2]=" + someIntArray2[1].ToString() + Environment.NewLine +

" someIntArray[3]=" + someIntArray2[2].ToString() + Environment.NewLine;

}

private void create3DimensionalArray_Click(object sender, EventArgs e)

{

textBox.Text += Environment.NewLine;

int[,,] some3DArray = new int[1, 1, 1];

textBox.Text += "Create and initialization of 3 dimensional array" + Environment.NewLine + "";

textBox.Text += Environment.NewLine +

" some3DArray[0,0,0]=" + some3DArray[0, 0, 0].ToString() + Environment.NewLine;

}

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C#. Пример на перечисления и массивы

Posted on 29.12.2016 by Stanislav_Panteleev

Вот что у нас получится А вот собственно код…

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class MainForm : Form
    {

        

        public MainForm()
        {
            InitializeComponent();
        }



        private void button1_Click(object sender, EventArgs e)
        {
            int i=10;

            //i = 1000000;



            MessageBox.Show("Hello world, just started learn C# " +
                " I love you C# " + i.ToString() + " times " +"\n"+ sizeof(int).ToString() +"bytes");

        }


//------------------------------------------------------------------------------

      // Describing new enum type here  
      enum WeekDays
        {
            Monday, Tuesday, Wednesday,
            Thursday, Friday, Saturday, Sunday
        };

      // Describing new array of strings here
        string[] WeekDaysRussianNames = { "Понедельник", "Вторник",
 "Среда", "Четверг", "Пятница", "Суббота", "Воскресенье" };


        WeekDays day = WeekDays.Thursday;




        private void bTest_Click(object sender, EventArgs e)
        {

            // day in English
            richTextBox.AppendText("Сегодня " + day+"\n");

            // // day in Russsian
            richTextBox.AppendText(
                
                "Сегодня " + WeekDaysRussianNames[(int)day]+"\n"
                
                );


            // index of day

            int dayIndex = (int)day + 1;

            richTextBox.AppendText(

                "Номер дня " + dayIndex + "\n"

                );


            // check by Comparing
            if (day == WeekDays.Thursday) {

                richTextBox.AppendText(

                    "Сегодня день недели " + day + "\n"

                    );


            };


        }
    }
}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

public partial class MainForm : Form

{

public MainForm()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

int i=10;

//i = 1000000;

MessageBox.Show("Hello world, just started learn C# " +

" I love you C# " + i.ToString() + " times " +"\n"+ sizeof(int).ToString() +"bytes");

}

//------------------------------------------------------------------------------

// Describing new enum type here

enum WeekDays

{

Monday, Tuesday, Wednesday,

Thursday, Friday, Saturday, Sunday

};

// Describing new array of strings here

string[] WeekDaysRussianNames = { "Понедельник", "Вторник",

"Среда", "Четверг", "Пятница", "Суббота", "Воскресенье" };

WeekDays day = WeekDays.Thursday;

private void bTest_Click(object sender, EventArgs e)

{

// day in English

richTextBox.AppendText("Сегодня " + day+"\n");

// // day in Russsian

richTextBox.AppendText(

"Сегодня " + WeekDaysRussianNames[(int)day]+"\n"

);

// index of day

int dayIndex = (int)day + 1;

richTextBox.AppendText(

"Номер дня " + dayIndex + "\n"

);

// check by Comparing

if (day == WeekDays.Thursday) {

richTextBox.AppendText(

"Сегодня день недели " + day + "\n"

);

};

}

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Category Archives: C#

C#. Param modificators and overload

С#. Some remarks alltogether

C#. Value types, Reference types, Object types, String Types, Dynamic Types, Pointer Type

C#.Processings with args of command line

C#. Different variants of method Main

Алгоритмы. Delphi. C#. PHP. JS. Бинарный поиск в массивах на 4 языках

C#. Создание и инициализация массивов

C#. Пример на перечисления и массивы

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