How to add 2 Files in one File

Joe Wilson

12y1.1kVisual Basic .NET

First,ask user to enter numbers next, after arranging the numbers add this in the new file.

for example:

The number which have been entered for first File: 69 25 44 33 12

File 1

69 25 44 33 12

File 2

The Number which have been entered by user is: 65 95 74 21 41 10

65 95 74 21 41 10

File 3

10 12 21 25 33 41 44 65 69 74 95

3 Replies

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Vulpes12y ago
Try this:

using System;
using System.IO;

class Program
{
static void Main()
{
// obtain and write the numbers to the 2 files

Console.Write("How many numbers are to be entered in file 1? : ");
int n1 = int.Parse(Console.ReadLine());
string[] numbers1 = new string[n1];
for (int i = 0; i < n1 ; i++)
{
Console.Write(" Number {0} : ", i + 1);
numbers1[i] = Console.ReadLine();
}

File.WriteAllText("joe_file1.txt", String.Join(" ", numbers1));

Console.Write("\nHow many numbers are to be entered in file 2? : ");
int n2 = int.Parse(Console.ReadLine());
string[] numbers2 = new string[n2];
for (int i = 0; i < n2 ; i++)
{
Console.Write(" Number {0} : ", i + 1);
numbers2[i] = Console.ReadLine();
}

File.WriteAllText("joe_file2.txt", String.Join(" ", numbers2));

// read back the numbers, combine them and convert to ints

string text1 = File.ReadAllText("joe_file1.txt");
numbers1 = text1.Split(' ');
string text2 = File.ReadAllText("joe_file2.txt");
numbers2 = text2.Split(' ');
int len1 = numbers1.Length;
int len2 = numbers2.Length;
int len3 = len1 + len2;
int[] numbers3 = new int[len3];

for(int i = 0; i < len1; i++)
{
numbers3[i] = int.Parse(numbers1[i]);
}


for(int i = len1; i < len3; i++)
{
numbers3[i] = int.Parse(numbers2[i - len1]);
}

Array.Sort(numbers3); // sort them

// write the combined numbers to file3

using(StreamWriter sw = new StreamWriter("joe_file3.txt"))
{
for(int i = 0; i < len3; i++)
{
sw.Write(numbers3[i]);
if (i < len3 - 1) sw.Write(" ");
}
}

// read them back and write to console

Console.WriteLine("\nThe {0} numbers contained in file 3 are\n", len3);
string text3 = File.ReadAllText("joe_file3.txt");
Console.WriteLine(text3);
Console.ReadKey();
}
}

Sample input/output:

How many numbers are to be entered in file 1? : 5
Number 1 : 69
Number 2 : 25
Number 3 : 44
Number 4 : 33
Number 5 : 12

How many numbers are to be entered in file 2? : 6
Number 1 : 65
Number 2 : 95
Number 3 : 74
Number 4 : 21
Number 5 : 41
Number 6 : 10

The 11 numbers contained in file 3 are

10 12 21 25 33 41 44 65 69 74 95
Joe Wilson12y ago
1)The files format must be text

2) The files can contain equal numbers

3) the result of sorting must print out in file3

Thank You for your attentions

Joe Wilson
Shweta Lodha12y ago
Please provide more inputs:
1) What is the file format ? Is it csv, .txt, etc ?
2) Will your file contain only numbers?
3) Can there be same numbers in your files ?
4) Do you want the sorted output in your third file ?