How to add 2 Files in one File

Question

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

Vulpes · Answer

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 { Console.Write(" Number {0} : ", i + 1); numbers1[i] = Console.ReadLine(); } File.WriteAllText("joe_file1.txt", String.Join(" ", numbers1)); Console.Write("
How 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 { 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 { numbers3[i] = int.Parse(numbers1[i]); } for(int i = len1; 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 { sw.Write(numbers3[i]); if (i } } // read them back and write to console Console.WriteLine("
The {0} numbers contained in file 3 are
", 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 Wilson · Answer

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 Lodha · Answer

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 ?

How to add 2 Files in one File

Answers (3)