50 lines
1.7 KiB
C#
50 lines
1.7 KiB
C#
using System;
|
|
using System.IO;
|
|
|
|
|
|
class filexercise14
|
|
{
|
|
static void Main()
|
|
{
|
|
string fileName = @"mytest.txt";
|
|
string[] ArrLines ;
|
|
int n,i,l,m=1;
|
|
Console.Write("\n\n Read last n number of lines from a file :\n");
|
|
Console.Write("-----------------------------------------------\n");
|
|
if (File.Exists(fileName))
|
|
{
|
|
File.Delete(fileName);
|
|
}
|
|
Console.Write(" Input number of lines to write in the file :");
|
|
n= Convert.ToInt32(Console.ReadLine());
|
|
ArrLines=new string[n];
|
|
Console.Write(" Input {0} strings below :\n",n);
|
|
for(i=0; i<n; i++)
|
|
{
|
|
Console.Write(" Input line {0} : ",i+1);
|
|
ArrLines[i] = Console.ReadLine();
|
|
}
|
|
System.IO.File.WriteAllLines(fileName, ArrLines);
|
|
Console.Write("\n Input last how many numbers of lines you want to display :");
|
|
l = Convert.ToInt32(Console.ReadLine());
|
|
m=l;
|
|
if(l>=1 && l<=n)
|
|
{
|
|
Console.Write("\n The content of the last {0} lines of the file {1} is : \n",l,fileName);
|
|
if (File.Exists(fileName))
|
|
{
|
|
for(i=n-l; i<n; i++)
|
|
{
|
|
string[] lines = File.ReadAllLines(fileName);
|
|
Console.Write(" The last no {0} line is : {1} \n",m,lines[i]);
|
|
m--;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Console.WriteLine(" Please input the correct line no.");
|
|
}
|
|
Console.WriteLine();
|
|
}
|
|
} |