C#•2y ago

❔ Random Letter

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        string file = @"codes.txt";
        File.WriteAllText(file, $"{randomstring}\n");
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

}
}

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        string file = @"codes.txt";
        File.WriteAllText(file, $"{randomstring}\n");
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

}
}

I want it to make a bunch of random codes that is 7 characters long and w+ to a file and than after 1000 of these itll delete all the codes and start over again but why wont this work?

8 Replies

HelixStar•2y ago

Your writing to the file each time you create a new string.

everestshOP•2y ago

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        string file = @"codes.txt";
        File.AppendAllText(file, $"{randomstring}\n");
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

}
}

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        string file = @"codes.txt";
        File.AppendAllText(file, $"{randomstring}\n");
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

}
}

Yeah I changed it to append but I want it to clear it after the 1000 codes are inside it

HelixStar•2y ago

Here is some sample code

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String FileText = "";
    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        FileText = FileText + $"{randomstring}\n";
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

    string file = @"codes.txt";
    File.WriteAllText(file, FileText );

}
}

using System;
using System.IO;

class GFG{

public static void Main(string[] args)
{
    Random res = new Random();

    String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    String FileText = "";
    String randomstring = "";
    for (int i = 0; i < 1000; i++){
        for (int a = 0; a < 7; a++)
        {

          int x = res.Next(str.Length);
          randomstring = randomstring + str[x];
        }
        FileText = FileText + $"{randomstring}\n";
        Console.WriteLine("Random alphanumeric String:" + randomstring);
    }

    string file = @"codes.txt";
    File.WriteAllText(file, FileText );

}
}

everestshOP•2y ago

but that would result in 3 for loops which is bad

HelixStar•2y ago

This code might fix it

everestshOP•2y ago

@ZuggerFish /home/runner/ImgurGEN/main.cs(28,2): error CS1513: } expected [/home/runner/ImgurGEN/main.csproj] The build failed. Fix the build errors and run again.

Tvde1•2y ago

you are missing a }

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Random Letter