File Appending

Joe Wilson

first open 2 files second put 5 Numbers in File1 (File should be text file) third put 6 Numbers in File2(File should be text file) next open third File3 and append both File1 and File2 in this File then arrange the numbers which has appended in File3

File 1

5 4 3 2 9

File2

9 5 99 48 25 32

File3

2 3 4 5 5 9 9 25 32 48 99

4 Replies

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Vulpes12y ago
Just sort the arrays before you write them to the files:

int[] numbers1 = {5, 4, 3, 2, 9};
int[] numbers2 = {9, 5, 99, 48, 25, 32};
Array.Sort(numbers1);
Array.Sort(numbers2);
Hiatham Al-Mawali12y ago
you can use ArrayList.Sort();
Joe Wilson12y ago
Thank you for your answer,By the way, How can i append two sorted files in the new file?
Vulpes12y ago
Try this:

using System;
using System.IO;

class Program
{
static void Main()
{
int[] numbers1 = {5, 4, 3, 2, 9};
int[] numbers2 = {9, 5, 99, 48, 25, 32};

using(StreamWriter sr = new StreamWriter("file1.txt"))
{
for(int i = 0; i < numbers1.Length; i++)
{
sr.Write(numbers1[i]);
if (i < numbers1.Length - 1) sr.Write(" ");
}
}

using(StreamWriter sr = new StreamWriter("file2.txt"))
{
for(int i = 0; i < numbers2.Length; i++)
{
sr.Write(numbers2[i]);
if (i < numbers2.Length - 1) sr.Write(" ");
}
}

FileStream fs = File.Create("file3.txt");
fs.Close();

string text1 = File.ReadAllText("file1.txt");
string text2 = File.ReadAllText("file2.txt");

File.AppendAllText("file3.txt", text1);
File.AppendAllText("file3.txt", " " + text2);

string text3 = File.ReadAllText("file3.txt");
string[] items = text3.Split(' ');
int[] numbers3 = new int[items.Length];

for(int i = 0; i < items.Length; i++)
{
numbers3[i] = int.Parse(items[i]);
}

Array.Sort(numbers3);

using(StreamWriter sr = new StreamWriter("file3.txt"))
{
for(int i = 0; i < numbers3.Length; i++)
{
sr.Write(numbers3[i]);
if (i < numbers3.Length - 1) sr.Write(" ");
}
}
}
}