array handling and vb .net to c# translation help

I am new to C# and I would like to know how to handle array in C#. Here's the code I wrote in vb .net. I got stuck when I tried to translated it to C#. Could someone help?

Code:

---

    Sub Main()
        Randomize()
        Dim randNum(45) As Integer  ' counters
        Dim randGen As New Random(DateTime.Now.Millisecond)  ' random generator
        Dim randInd As Integer = 0  ' loop counter

        Dim intTemp As Int16 = 0

        'Start...
        For randInd = 1 To 2000
            randNum(randGen.Next(1, 46)) += 1  ' increment counter
        Next

        Console.WriteLine("Numbers  Times")
        Console.WriteLine("=======  =====")

        For randInd = 1 To 45
            Console.WriteLine(randInd.ToString().PadLeft(3) + "      " + randNum(randInd).ToString())
        Next

        'Most frequent randomized number:
        Dim temp As String
        'Dim memory As String
        Dim check As Int16
        Dim checkTime As Int16
        checkTime = 7

        Console.WriteLine("")
        Console.WriteLine("The top 7 most frequent randomized numbers are:")
        Console.WriteLine("")

        For check = 1 To checkTime
            For randInd = 1 To 45
                If randNum(randInd) = intTemp Then
                    If temp.Length <> 0 Then
                        temp = temp + " & " + randInd.ToString()
                        'memory = randInd.ToString()
                    Else
                        temp = randInd.ToString()
                        'memory = randInd.ToString()
                    End If
                ElseIf randNum(randInd) > intTemp And randNum(randInd) <> intTemp Then
                    intTemp = randNum(randInd)
                    temp = randInd.ToString()
                    'memory = randInd.ToString()
                End If
            Next

            For randInd = 1 To 45
                If randNum(randInd) = intTemp Then randNum(randInd) = 0
            Next

            Console.WriteLine(temp.PadLeft(25) + ": " + intTemp.ToString() + " times") 'Write the top numbers
            intTemp = 0
        Next check

        Console.WriteLine("")
        Console.WriteLine("Press any key to continue")
        Console.ReadLine()

    End Sub

---

whats where u have problems with? in c# the array indexer simbol is [] instead of vb's () so in a string array you do myArray[0] to get the first slot of the array

here: Console.WriteLine(randInd.ToString().PadLeft(3) + " " + randNum(randInd).ToString())
when i used [] it told me error or something

Console.WriteLine(randInd.ToString().PadLeft(3) + " " + randNum[randInd].ToString());

not doesn't work. it says cannot apply indexing with [] to an expression as type 'int'

it also happens when I try to do this...

Code:

---

for(randInd=1; randInd<=2000; randInd++)
{        randNum[randGen.Next(45)]++;        }

---

randNum is not declared as an array. Try this

Code:

---

int[] randNum = new int[45];

---

thanks but this doesn't work still:

Code:

---

Console.WriteLine(randInd.ToString().PadLeft(3) + " " + randNum[randInd].ToString());

---

Post all the C# code that you have.

i haven't finished it yet but so far this is what i got...

Code:

---

int[] randNum = new int[45];
                        Random randGen = new Random();
                        int randInd = 0;
                        int intTemp = 0;

                        //Start
                        for(randInd=1; randInd<=2000; randInd++)
                        {        randNum[randGen.Next(45)]++;        }

                        Console.WriteLine("Numbers  Times");
                        Console.WriteLine("=======  =====");                       

                        for(randInd=1; randInd<=45; randInd++)
                        {
                                Console.WriteLine(randInd.ToString().PadLeft(3) + " " + randNum[randInd].ToString());
            }

---

I just ran the code and it worked fine. I do get an exception at the end saying index is out of range. The reason for that is because arrays in C# are zero based. They start at zero. So if I sad

Code:

---

int[] num = new int[3];
//indexing would start at zero
num[0] = 100;
num[1] = 200;
num[2] = 300;

num[3] = 400 // this would throw an out of range exception

---

So I made a few changes to your code;

Code:

---

int[] randNum = new int[45];
Random randGen = new Random();
int randInd = 0;
int intTemp = 0;

//Start
for(randInd=1; randInd<=2000; randInd++)
{       
        randNum[randGen.Next(45)]++;       
}

Console.WriteLine("Numbers  Times");
Console.WriteLine("=======  =====");                       

for(randInd=0; randInd < 45; randInd++)
{
        Console.WriteLine(randInd.ToString().PadLeft(3) + " " + randNum[randInd].ToString());
}
Console.ReadLine();

---

in vb.net arent they all 0 based too?

Quote:

---

Originally posted by PT Exorcist
in vb.net arent they all 0 based too?

---

Both are zero based but the size differs.

Dim aData(4) As Object creates an array of five elements, zero through 4.

object[] aData = new object[4]; creates an array of 4 elements, zero through 3.

I guess in VB, you can make them start from 1 to the desired number?!

yeah you can set the lower and upper bound..from 69 to 666 for example :D

Here are my final codes. Anything to change/improve or are there any faster ways to accomplish the task?

Code:

---

using System;

namespace ConsoleApplication1
{
        /// <summary>
        /// Randomize from 0~44 for 200 times then pick up 7 of the most frequent randomized numbers.
        /// </summary>
        class Class1
        {
                /// <summary>
                /// See summary of Class1
                /// </summary>
                [STAThread]
                static void Main(string[] args)
                {
                        int[] randNum = new int[45];
                        Random randGen = new Random();
                        int randInd = 0;
                        int intTemp = 0;

                        // Start
                        for(randInd=1; randInd<=2000; randInd++)
                        {       
                                randNum[randGen.Next(45)]++;       
                        }

                        Console.WriteLine("Numbers  Times");
                        Console.WriteLine("=======  =====");                       

                        for(randInd=0; randInd < 45; randInd++)
                        {
                                Console.WriteLine(randInd.ToString().PadLeft(3) + "      " + randNum[randInd].ToString());
                        }

                        // Most frequent randomized numbers:
                        string temp="";
                        int check;
                        int checkTime = 7;
                       
                        Console.WriteLine("");
                        Console.WriteLine("The top "+checkTime.ToString()+" most frequent randomized #'s are:");
                        Console.WriteLine("");

                        for(check=1; check<=checkTime; check++)
                        {
                                for(randInd=0; randInd<45; randInd++)
                                {
                                        if(randNum[randInd]==intTemp)
                                        {
                                                if(temp.Length!=0)
                                                {        temp=temp+" & "+randInd.ToString();        }
                                                else
                                                {        temp=randInd.ToString();        }
                                        }
                                        if(randNum[randInd]>intTemp && randNum[randInd]!=intTemp)
                                        {
                                                intTemp=randNum[randInd];
                                                temp=randInd.ToString();
                                        }
                                }

                                for(randInd=0; randInd<45; randInd++)
                                {
                                        if(randNum[randInd]==intTemp)
                                        {        randNum[randInd]=0;        }
                                }

                                Console.WriteLine(temp.PadLeft(21)+": "+intTemp.ToString()+" times");
                                intTemp=0;
                        }

                        Console.WriteLine("");
                        Console.WriteLine("Press any key to continue");
                        Console.ReadLine();
                }
        }
}

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