Megoldás:
using System;
using System.IO;
namespace _2022._01._14
{
class Program
{
static void kiir()
{
int i = 0;
while (i < tomb.Length)
{
Console.WriteLine(tomb[i]);
i++;
}
Console.ReadLine();
}
static int[] tomb = new int[100];
static void Main(string[] args)
{
StreamReader sr = new StreamReader("szamok.txt");
int i = 0;
while (!sr.EndOfStream)
{
tomb[i] = Convert.ToInt32(sr.ReadLine());
i++;
}
sr.Close();
kiir();
StreamWriter sw = new StreamWriter("dupla.txt");
Console.WriteLine("A számok duplája: ");
i = 0;
while (i < tomb.Length)
{
Console.WriteLine(tomb[i] * 2);
sw.WriteLine(tomb[i] * 2);
i++;
}
sw.Close();
Console.ReadLine();
}
}
}