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