 using System;
using System.Collections.Generic;
using System.Linq;
using System.Collections;
using System.Text;

namespace ConsoleApplication_linq
{
    public class student
    {
        public string firstname{get; set;}
        public string lastname{get;set;}
        public int[] scores{get;set;}
        public decimal avg;
        
        class Program
        {
            static void Main(string[] args)
            {
                ArrayList list=new ArrayList();
                list.Add(
                    new student
                    {
                        firstname="CLASSY",
                        lastname="SHARON",
                        scores=new int[] {45,76,23,59}
                    });
                list.Add(
                   new student
                    {
                        firstname="RIYA",
                        lastname="PAT",
                        scores=new int[] {24,22,41,26}
                    });
                list.Add(
                   new student
                    {
                        firstname="MONET",
                        lastname="RITHIKA",
                        scores=new int[] {89,90,45,46}
                    });
                list.Add(
                   new student
                   {
                       firstname = "ALBE",
                       lastname = "SILVIA",
                       scores = new int[] { 43, 18, 25, 46 }
                   });

                var query=from student student in list
                          where((student.scores[0]+student.scores[1]+student.scores[2]+student.scores[3])/4)>40
                          select student;
                foreach(student s in query)
                    Console.WriteLine(s.firstname+" "+s.lastname+" "+((s.scores[0]+s.scores[1]+s.scores[2]+s.scores[3])/4));
            }
            }
    }
}

created 3 years ago by 19PCT05 CLASSY SHARON R

C Sharp Online Compiler

Write, Run & Share C# code online using OneCompiler's C# online compiler for free. It's one of the robust, feature-rich online compilers for C# language, running on the latest version 8.0. Getting started with the OneCompiler's C# compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C# and start coding.

Read inputs from stdin

OneCompiler's C# online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

using System;
 
namespace Sample
{
  class Test
    {
      public static void Main(string[] args)
       {
         string name;
         name = Console.ReadLine();
         Console.WriteLine("Hello {0} ", name);
	}
     }
}

About C Sharp

C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.

You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.

Syntax help

Data types

Data Type	Description	Range	size
int	To store integers	-2,147,483,648 to 2,147,483,647	4 bytes
double	to store large floating point numbers with decimals	can store 15 decimal digits	8 bytes
float	to store floating point numbers with decimals	can store upto 7 decimal digits	4 bytes
char	to store single characters	-	2 bytes
string	to stores text	-	2 bytes per character
bool	to stores either true or false	-	1 bit

Variables

Syntax

datatype variable-name = value;

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.

if(conditional-expression) {
   // code
} 
else {
   // code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement) {
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

data-type[] array-name;

Methods

Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.

Syntax

static void method-name() 
{
  // code to be executed
}