using System; // using System.Collections; using System.Collections.Generic; // using System.Linq; // using System.Text.RegularExpressions; namespace HelloWorld { public class Employee{ public string EmployeeName; public int EmployeeId; public double Salary; public Employee(string EmployeeName,int EmployeeId,double Salary){ this.EmployeeName=EmployeeName; this.EmployeeId=EmployeeId; this.Salary=Salary; } } public class EmployeeDAL{ List<Employee> sortedlist = new List<Employee>(); int index=0; public bool AddEmployee(Employee e){ for(int i=0;i<sortedlist.Count;i++){ Employee e1 = (Employee)sortedlist[i]; } sortedlist.Add(e); return true; } public bool DeleteEmployee(int id){ foreach(var element in sortedlist){ if(element.EmployeeId == id){ // sortedlist.Remove(id); return true; } } return false; } public string searchEmployee(int id){ foreach(var element in sortedlist){ if(element.EmployeeId == id){ return element.EmployeeName; } } return "Name not found"; } public Employee[] GetAllEmployee(){ Employee[] employarray = new Employee[sortedlist.Count]; for(int i=0;i<sortedlist.Count;i++){ employarray[i] = (Employee)sortedlist[i]; } return employarray; } } public class Program { public static void Main(string[] args) { EmployeeDAL e1 = new EmployeeDAL(); Console.WriteLine(e1.AddEmployee(new Employee ("safdfft",1,20000.0))); // Console.WriteLine(e1.AddEmployee(new Employee ("krehh",2,20000.0))); Console.WriteLine(e1.DeleteEmployee(1)); Console.WriteLine(e1.searchEmployee(2)); Employee[] emp =e1.GetAllEmployee(); foreach(Employee e in emp){ Console.WriteLine(e.EmployeeName+" "+e.EmployeeId+" "+e.Salary); } } } }
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.
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);
}
}
}
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.
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 |
datatype variable-name = value;
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.
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;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement) {
// code
}
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
}
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);
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.
data-type[] array-name;
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.
static void method-name()
{
// code to be executed
}