Login-Validation Account with Monodevelop:
This is a Login-Validation application where the user can
insert their user name and password. If the user name & password inserted
correctly then a welcome message displays.
Coding:
using
System;
namespace login
{
class MainClass
{
public static void Main(string[]
args)
{
Console.Clear();
Console.WriteLine("**********
LOGIN ACOUNT **********");
Console.WriteLine("ENTER
YOUR USER NAME :");
string user =
Console.ReadLine();
Console.WriteLine("ENTER
YOUR PASSWORD :");
string pass =
Console.ReadLine();
if (user ==
"DEEPAK" || user ==
"deepak")
{
if (pass ==
"DWIJ" || pass ==
"dwij")
{
Console.WriteLine("***************
MCN SOLUTION WELCOME'S" + "\t" + user
+ "!!!!!!!!!!!!");
Console.WriteLine("
STRING CHOICES ");
Console.WriteLine("*------------------------------*");
Console.WriteLine("
1.String Length");
Console.WriteLine("
2.Treating Strings as Arrays");
Console.WriteLine("
3.Concatenating Strings");
Console.WriteLine("
4.Comparing String");
Console.WriteLine("
5.String Replacement");
Console.WriteLine("*-------------------------------*");
Console.WriteLine("ENTER
YOUR CHOICE");
int a =
Convert.ToInt32(Console.ReadLine());
switch (a)
{
case 1: Console.WriteLine("Enter
the String");
string slen =
Console.ReadLine();
Console.WriteLine("String
length is :" + slen.Length); break;
case 2: Console.WriteLine("Enter
the String");
string s =
Console.ReadLine();//Displays
character
Console.WriteLine(s[2]
+ "\t" +
"Displaying 3rd character of string ");
//s[0],s[1].....s[n]
break;
case 3: Console.WriteLine("Enter
the String");
string s1 =
Console.ReadLine();
Console.WriteLine("Enter
another String");
string s2 =
Console.ReadLine();
Console.WriteLine(s1
+ "\t" + s2);
break;
case 4:
Console.WriteLine("Enter
the String");
string s3 =
Console.ReadLine();
Console.WriteLine("Enter
another String");
string s4 =
Console.ReadLine();
if (s3 == s4)
{
Console.WriteLine("Strings
matched..");
}
else
{
Console.WriteLine("Strings
dont matched..");
}
break;
case 5: Console.WriteLine("Enter
the String");
string s5 =
Console.ReadLine();
string news;
news = s5.Replace(s5,
"---Love Is Blind---");
Console.WriteLine(news);
break;
default: Console.WriteLine("Invalid
choice !"); break;
}
Console.WriteLine("***************************************");
Console.WriteLine("Thanks
you !! DEEPAK DWIJ !!");
Console.Read();
}
}
else
{
Console.WriteLine("
Sorry !! invalid user & password : "+"\t"+user+"\t"+pass);
}
}
}
}
Output: To Run Press
Ctrl+F5 then
Enter your user name
Enter your user name and
password
If the user name & password are correctly input then a welcome message displays. Here are the number of choices you
can enter
1.To find the String Length
2.Treating string as an Arrays
3.To Concatenating strings
4.To compare the Strings
5.To replacing a string
Otherwise invalid user
displays
