Csharp Programming Examples

https://pt.stackoverflow.com/q/364588/101

csharp

using static System.Console;

public class Program {
	public static void Main() {
	    decimal n;
		if (!decimal.TryParse(ReadLine(), out n)) return;
		var resto = (int)(n * 100);
		WriteLine("NOTAS:");
		WriteLine($"{resto / 10000} nota(s) de R$ 100.00");
		resto %= 10000;
		WriteLine($"{resto / 5000} nota(s) de R$ 50.00");
		resto %= 5000;
		WriteLine($"{resto / 2000} nota(s) de R$ 20.00");
		resto %= 2000;
		WriteLine($"{resto / 1000} nota(s) de R$ 10.00");
		resto %= 1000;
		WriteLine($"{resto / 500} nota(s) de R$ 5.00");
		resto %= 500;
		WriteLine($"{resto / 200} nota(s) de R$ 2.00");
		WriteLine("MOEDAS:");
		resto %= 200;
		WriteLine($"{resto / 100} moeda(s) de R$ 1.00");
		resto %= 100;
		WriteLine($"{resto / 50} moeda(s) de R$ 0.50");
		resto %= 50;
		WriteLine($"{resto / 25} moeda(s) de R$ 0.25");
		resto %= 25;
		WriteLine($"{resto / 10} moeda(s) de R$ 0.10");
		resto %= 10;
		WriteLine($"{resto / 5} moeda(s) de R$ 0.05");
		resto %= 5;
		WriteLine($"{resto} moeda(s) de R$ 0.01");
	}
}

//https://pt.stackoverflow.com/q/364588/101

MYPP

csharp

using System.IO;
using System;

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

Access Specifier

csharp

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
 namespace Unit_1
 {
     struct Books
     {
         public string title;
         public float price;
         public int page;
         public void getvalues(string t,float pr,int pg)
         {
             title =t;
             price =pr;
             page =pg;
         }
  
         public void display()
         {
             Console.WriteLine("title:{0}",title);
             Console.WriteLine("price:{0}",price);
             Console.WriteLine("page:{0}",page);
         }
     };
     class program
     {
         static void main(string[] args)
         {
             Books Book1 =new Books();
             Books Book2 =new Books();
             
             Book1.getvalues("c programming",600.50,800);
             Book2.getvalues("c# programming",1000.50,899);
             Book1.display();
             Book2.display();
             Console.ReadKey();
         }
     }
 }

mycodw

csharp

using System;
using System.IO;
using System.IO.FileStream;

namespace FileIOApplication {
   
   class Program {
      
      static void Main(string[] args) {
         FileStream F = new FileStream("test.dat", FileMode.OpenOrCreate, 
            FileAccess.ReadWrite);
         
         //for (int i = 1; i <= 20; i++) {
           // F.WriteByte((byte)i);
         //}
         int [] data=new int [2] {'A','B'};
         int z=data.length;
         for(int i=0;i<z;i++)
         {
             F.WriteByte((byte) data[i]);
             
         }
         
         F.Position = 0;
         //for (int i = 0; i <= 20; i++) {
           // Console.Write(F.ReadByte() + " ");
         //}
         int data1=F.ReadByte();
         while(data1!=-1)
         {
             Console.Write((int)data1 + " ");
             data1=F.ReadByte();
         }
         F.Close();
         Console.ReadKey();
      }
   }
}

C# Basic Syntax

csharp

using System;

namespace RectangleApplication {
   
   class Rectangle {
      // member variables
      double length;
      double width;
      
      public void Acceptdetails() {
         length = 4.5;    
         width = 3.5;
      }
      
      public double GetArea() {
         return length * width; 
      }
      
      public void Display() {
         Console.WriteLine("Length: {0}", length);
         Console.WriteLine("Width: {0}", width);
         Console.WriteLine("Area: {0}", GetArea());
      }
   }
   
   class ExecuteRectangle {
   
      static void Main(string[] args) {
         Rectangle r = new Rectangle();
         r.Acceptdetails();
         r.Display();
         Console.ReadLine(); 
      }
   }
}

Compile and Execute C# Sharp Online

csharp

using System.IO;
using System;

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

C# - Accessing Array Elements

csharp

using System;

namespace ArrayApplication {

   class MyArray {
   
      static void Main(string[] args) {
         int []  n = new int[10]; /* n is an array of 10 integers */
         int i,j;

         /* initialize elements of array n */
         for ( i = 0; i < 10; i++ ) {
            n[ i ] = i + 100;
         }
         
         /* output each array element's value */
         for (j = 0; j < 10; j++ ) {
            Console.WriteLine("Element[{0}] = {1}", j, n[j]);
         }
         Console.ReadKey();
      }
   }
}

asdasd

csharp

using System;

namespace Tanulas
{
    class IsPrime
    {
        static void Main()
        {
            TestOperation();
        }
        static int UserInput()
        {
            Console.Write("Kérek egy számot: ");
            int input = int.Parse(Console.ReadLine());
            return input;
        }
        static void UserOperation()
        {
            var input = UserInput();
            Prime(input);
        }
        static void TestOperation()
        {
            var r = new Random();
            for (int i = 0; i < 10; i++)
            {
                var input = r.Next(1, 100);
                Prime(input);
            } 
        }
        static bool ModCounter(int input)
        {
            int mods = 0;
            int cnt;

            for (int i = 1; i <= input; i++)
            {
                cnt = input % i;
                if (cnt == 0)
                {
                    mods++;
                }
            }

            if (mods == 2)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        static void Prime(int input)
        {
            if (ModCounter(input) == true)
            {
                Console.WriteLine("!!! " + input + " PRÍMSZÁM !!!");
            }
            else
            {
                Console.WriteLine(input + " nem prímszám!");
            }
        }

    }
}

Compile and Execute C# Sharp Online

csharp

using System.IO;
using System;

class Program
{
    static void Main()
    {
        string phone = "9019441572";
        
        bool IsInternational = !phone.Substring(phone.IndexOf("+"), phone.IndexOf("-") + 1).Equals("+91-");
        
        Console.WriteLine("IsInternational:= "+ IsInternational);
        
        
    }
}

String Example

csharp

using System.IO;
using System;

class Program
{
    static void Main()
    {        
        //Show Date
        DateTime date = new DateTime(2019,02,23);
        string date1 = date.ToString("M");
        string date2 = date.ToString("Y");
        string date3 = date.ToString("D");
        
        Console.WriteLine("Date : {0}", date);
        Console.WriteLine("Date : {0}", date1);
        Console.WriteLine("Date : {0}", date2);
        Console.WriteLine("Date : {0}", date3);
        
        //Make Substring
        string str = "Umbrella";
        string subStr1 = str.Substring(2,4);
        string subStr2 = str.Substring(0,6);
        
        Console.WriteLine("String : {0}", str);
        Console.WriteLine("Substring : {0}", subStr1);
        Console.WriteLine("Substring : {0}", subStr2);
        
        //Length of a String
        Console.WriteLine("String Length : {0}", str.Length);
        Char[] charArray = str.ToCharArray();
        Console.WriteLine("String Length : {0}", charArray.Length);
        Char[] revCharArray = new Char[charArray.Length];
        
        //Reverse of String
        revCharArray = charArray;
        Array.Reverse(revCharArray);
        string revStr1 = new String(revCharArray);
        Console.WriteLine("String : {0}", str);
        Console.WriteLine("Reverse String1 : {0}", revStr1);
        string revStr2 = "";
        int ind = str.Length - 1;
        while( ind >= 0)
        {
            revStr2 += str[ind];
            ind--;
        }
        Console.WriteLine("Reverse String2 : {0}", revStr2);
        
        // Concatenate Strings
        string fname = "Asif";
        string sname = "Kamal";
        Console.WriteLine("Full Name : {0}", String.Concat(fname," ",sname));
    }
}

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