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

namespace HelloWorld
{
  public class Student : IComparable<Student>{
    public string Name{get; set;}
    public int Age{get; set;}
    public int Marks{get; set;}
    
    public Student(string name, int age, int marks){
      this.Name = name;
      this.Age = age;
      this.Marks = marks;
    }
    
    public int CompareTo(Student other){
      if(this.Age > other.Age){
        return 1;
      }else if(this.Age < other.Age){
        return -1;
      }else{
        return 0;
      }
    }
  }
  
  public class CompareStudents : IComparer<Student>{
    public int Compare(Student x, Student y){
      if(x.Marks > y.Marks){
        return 1;
      }else if(x.Marks < y.Marks){
        return -1;
      }else{
        return 0;
      }
    }
  }
  
	public class Program
	{
		public static void Main(string[] args)
		{
		  List<Student> StudentList = new List<Student>();
		  
		  var S1 = new Student("Peter", 12, 500);
		  var S2 = new Student("Glenn", 13, 450);
		  var S3 = new Student("Joe", 14, 400);
		  var S4 = new Student("Cleveland",12, 350);
		  
		  StudentList.Add(S1);
		  StudentList.Add(S2);
		  StudentList.Add(S3);
		  StudentList.Add(S4);
		  
		  StudentList.Sort();
		  StudentList.Reverse();
		  Console.WriteLine("Sorting by IComparable : ");
		  foreach(Student val in StudentList){
		    Console.WriteLine($"Name : {val.Name}, Age : {val.Age}, Marks : {val.Marks}");
		  }
		  
		  CompareStudents obj = new CompareStudents();
		  StudentList.Sort(obj);
		  Console.WriteLine("Sorting by IComparer : ");
		  foreach(Student val in StudentList){
		    Console.WriteLine($"Name : {val.Name}, Age : {val.Age}, Marks : {val.Marks}");
		  }
		}
	}
}

created 1 year ago

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
}