Hello, Is there another simple solution if I want to specify the step size? Example + 4 or + 7 Step 4, I will do this. Convert letters increase by step string ret = GetNext(RevisionId); txtOutput.AppendText(Environment.NewLine); txtOutput.AppendText(ret); ret = GetNext(ret); txtOutput.AppendText(Environment.NewLine); txtOutput.AppendText(ret); ret = GetNext(ret); txtOutput.AppendText(Environment.NewLine); txtOutput.AppendText(ret); ret = GetNext(ret); txtOutput.AppendText(Environment.NewLine); txtOutput.AppendText(ret); Maybe better, I can say the step size. Works for 2 digits, then some problems wir overflow. Can somebody see the reason and can improve the code? string GetNewValue(string input, int index) { string Mask_range = Mask; // "ABCDEFGHJKLMNPQRSTUVWXYZ"; string result = ""; bool isOverflow = true; bool isCarryOverLastCharacter = false; for (int i = input.Length - 1; i >= 0; --i) { char c = input[i]; if (isOverflow) { int k = Mask_range.IndexOf(c); if (k + index >= Mask_range.Length - 1) { char next_c = result.Length == 0 ? Mask_range[0 + index - Mask_range.Length + k] : Mask_range[0]; result = next_c + result; isOverflow = true; isCarryOverLastCharacter = true; } else { char next_c = isCarryOverLastCharacter ? Mask_range[k + 1] : Mask_range[k + index]; result = next_c + result; isOverflow = false; isCarryOverLastCharacter = false; } } else { result = c + result; } } if (isOverflow) result = Mask_range[0] + result; return result; }

using System; using System.Text; class Program { static void Main(string[] args) { string mask = "ABCDEFGHJKLMNPQRSTUVWXYZ"; for (int i = 0; i < 1000; i++) { var str = GetString(mask, i); var value = GetInteger(mask, str); if (value != i) { Console.WriteLine($"** ERROR ** {i}:{value}:{str}"); } } Console.WriteLine(IncreaseByStep(mask, "A", 1)); // B Console.WriteLine(IncreaseByStep(mask, "A", 2)); // C Console.WriteLine(IncreaseByStep(mask, "A", mask.Length)); // AA Console.ReadKey(); } public static string IncreaseByStep(string mask, string str, int step) { return GetString(mask, GetInteger(mask, str) + step); } public static int GetInteger(string mask, string str) { if (str == null) { return 0; } int baseValue = 1; int intValue = 0; for (int i = str.Length - 1; i >= 0; i--) { char c = str[i]; int index = mask.IndexOf(c); if (index == -1) { throw new ArgumentOutOfRangeException(); } intValue += (index + 1) * baseValue; baseValue *= mask.Length; } return intValue; } public static string GetString(string mask, int value) { if (value < 0) { throw new ArgumentOutOfRangeException(); } int baseValue = mask.Length; var sb = new StringBuilder(); while (value > 0) { int tmp = (value - 1) / baseValue; int index = value - tmp * baseValue; char c = mask[index - 1]; sb.Insert(0, c); value = tmp; } return sb.ToString(); } }

convert letters increase by step

Noah Aas 360

Hello,

11-Ashampoo_Snap_Mittwoch, 12. Juni 2024_14h15m01s_001_

Is there another simple solution if I want to specify the step size?

Example + 4 or + 7

Step 4, I will do this. Convert letters increase by step

string ret = GetNext(RevisionId);
txtOutput.AppendText(Environment.NewLine);
txtOutput.AppendText(ret);

ret = GetNext(ret);
txtOutput.AppendText(Environment.NewLine);
txtOutput.AppendText(ret);

ret = GetNext(ret);
txtOutput.AppendText(Environment.NewLine);
txtOutput.AppendText(ret);

ret = GetNext(ret);
txtOutput.AppendText(Environment.NewLine);
txtOutput.AppendText(ret);

Maybe better, I can say the step size. Works for 2 digits, then some problems wir overflow. Can somebody see the reason and can improve the code?

enter image description here

string GetNewValue(string input, int index)
{
	string Mask_range = Mask; // "ABCDEFGHJKLMNPQRSTUVWXYZ";

	string result = "";
	bool isOverflow = true;
	bool isCarryOverLastCharacter = false;
	for (int i = input.Length - 1; i >= 0; --i)
	{
		char c = input[i];

		if (isOverflow)
		{
			int k = Mask_range.IndexOf(c);
			if (k + index >= Mask_range.Length - 1)
			{
				char next_c = result.Length == 0 ? Mask_range[0 + index - Mask_range.Length + k] : Mask_range[0];
				result = next_c + result;
				isOverflow = true;
				isCarryOverLastCharacter = true;
			}
			else
			{
				char next_c = isCarryOverLastCharacter ? Mask_range[k + 1] : Mask_range[k + index];
				result = next_c + result;
				isOverflow = false;

				isCarryOverLastCharacter = false;
			}
		}
		else
		{
			result = c + result;
		}
	}

	if (isOverflow)
		result = Mask_range[0] + result;

	return result;
}

Hongrui Yu-MSFT 785 Microsoft Vendor

Hi,@Noah Aas. Welcome to Microsoft Q&A.

According to my test, it seems that there is no problem. Can you describe the overflow situation?


Console.WriteLine(GetNewValue("ZAZ", 7));   //output:  ZBG

Console.WriteLine(GetNewValue("AH", 4));    //output:  AM

Console.WriteLine(GetNewValue("AZ", 4));    //output:  BD

Console.WriteLine(GetNewValue("Z",4));      //output:  AD

KOZ6.0 6,300 Reputation points

2024-06-13T05:16:17.19+00:00
Maybe it's an IndexOutOfRangeException?

Console.WriteLine(GetNewValue("AY", 1)); // IndexOutOfRangeException
Noah Aas 360 Reputation points

2024-06-13T05:23:38.75+00:00

Yes, if the step greater than length mask.
KOZ6.0 6,300 Reputation points

2024-06-13T05:56:21.2533333+00:00

If you create a process like this that is specialized for addition, it becomes inflexible. If you want to subtract, you have to create a separate process.

Accepted answer

KOZ6.0 6,300 Reputation points

2024-06-13T01:54:04.94+00:00
using System; using System.Text; class Program { static void Main(string[] args) { string mask = "ABCDEFGHJKLMNPQRSTUVWXYZ"; for (int i = 0; i < 1000; i++) { var str = GetString(mask, i); var value = GetInteger(mask, str); if (value != i) { Console.WriteLine($"** ERROR ** {i}:{value}:{str}"); } } Console.WriteLine(IncreaseByStep(mask, "A", 1)); // B Console.WriteLine(IncreaseByStep(mask, "A", 2)); // C Console.WriteLine(IncreaseByStep(mask, "A", mask.Length)); // AA Console.ReadKey(); } public static string IncreaseByStep(string mask, string str, int step) { return GetString(mask, GetInteger(mask, str) + step); } public static int GetInteger(string mask, string str) { if (str == null) { return 0; } int baseValue = 1; int intValue = 0; for (int i = str.Length - 1; i >= 0; i--) { char c = str[i]; int index = mask.IndexOf(c); if (index == -1) { throw new ArgumentOutOfRangeException(); } intValue += (index + 1) * baseValue; baseValue *= mask.Length; } return intValue; } public static string GetString(string mask, int value) { if (value < 0) { throw new ArgumentOutOfRangeException(); } int baseValue = mask.Length; var sb = new StringBuilder(); while (value > 0) { int tmp = (value - 1) / baseValue; int index = value - tmp * baseValue; char c = mask[index - 1]; sb.Insert(0, c); value = tmp; } return sb.ToString(); } }
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Noah Aas 360 Reputation points

2024-06-13T05:40:01.3533333+00:00

Thanks looks good, but complicated. Can you explain a little more?

KOZ6.0 6,300 Reputation points

2024-06-13T06:30:16.1266667+00:00

Think of hexadecimal numbers.

For example, to convert 0xABC to a decimal number, you use the power of 16 to do the following calculation:

1016^2 + 1116^1 + 12*16^0 = 2560 + 176 + 12 = 2748

In the same way, simply assigning a numeric value to a character and calculating it as a base 24 number. Then, adjust each digit so that it is not zero.

KOZ6.0 6,300 Reputation points

2024-06-13T07:05:47.33+00:00

It's hard to explain..If mask = "AB"

KOZ6.0 6,300 Reputation points

2024-06-13T07:54:22.5833333+00:00

Markdown tables are difficult to use! I should have just pasted Excel images from the beginning.

Noah Aas 360 Reputation points

2024-06-13T16:33:29.8433333+00:00

Hello, First, thanks. Not all clear. you calculate or convert the input as an integer, then increase by the step.

ABC Hex -> 2748 Dec. In Hex we have 0 to 9 and A,B,C,D,E,First And here we have our own mask

string mask = "ABCDEFGHJKLMNPQRSTUVWXYZ"; 24 // Your approach is to convert everything to dec, increase, then output as MASK, right? We then have 2 base 24? // I tested with the HEX mask and isn't work. mask = "0123456789ABCDEF";

Why, see picture 1 & 2

I think this way is the best way, then it work.

Thanks for your help!

Picture 3

If overflow, then index = 0 and this is 0, but I expected 1

KOZ6.0 6,300 Reputation points

2024-06-13T22:59:46.5366667+00:00

If overflow, then index = 0 and this is 0, but I expected 1

That's strange. If mask = "ABC" and input = "CCC", will the next one become "AAAB"?

Noah Aas 360 Reputation points

2024-06-14T04:36:10.2+00:00

You're right, I thought I was simulate HEX.

Do you know what I mean? It seems to work differently.

KOZ6.0 6,300 Reputation points

2024-06-14T04:50:34.67+00:00

I am doing something similar, but I am not simulating HEX.

What is the correct behavior when overflow occurs?

mask="ABC" input="CCC" step=1 next="?"

Noah Aas 360 Reputation points

2024-06-14T05:02:17.39+00:00

I use the Windows calculator. Input HEX and increase the step .

Mask is 0123456789ABCDEF. HEX, base 16

KOZ6.0 6,300 Reputation points

2024-06-14T05:57:41.39+00:00

If simulate HEX,

mask="ABC" input="CCC" step=1 next="BAAA"

mask="0123456789ABCDEF", input="FFF" step=1 next="1000"

Is this OK?

public static string IncreaseByStep(string mask, string str, int step) { return GetString(mask, GetInteger(mask, str) + step); } public static int GetInteger(string mask, string str) { if (str == null) { return 0; } int baseValue = 1; int intValue = 0; for (int i = str.Length - 1; i >= 0; i--) { char c = str[i]; int index = mask.IndexOf(c); if (index == -1) { throw new ArgumentOutOfRangeException(); } intValue += index * baseValue; baseValue *= mask.Length; } return intValue; } public static string GetString(string mask, int value) { if (value < 0) { throw new ArgumentOutOfRangeException(); } int baseValue = mask.Length; var sb = new StringBuilder(); while (value > 0) { int tmp = value / baseValue; int index = value - tmp * baseValue; char c = mask[index]; sb.Insert(0, c); value = tmp; } return sb.ToString(); }

Noah Aas 360 Reputation points

2024-06-14T06:16:43.1233333+00:00

Is this OK?

Sure, what you change?

I think, I need both, depent from requirement.

Thanks!

When I use the first mask, works not. Why?

KOZ6.0 6,300 Reputation points

2024-06-14T07:13:19.3066667+00:00

When I use the first mask, works not. Why?

mask? input? step? next=?

Noah Aas 360 Reputation points

2024-06-14T07:25:00.8433333+00:00

mask = ABCDEFGHJKLMNPQRSTUVWXYZ

Input AG

Step 4

Next ?

Output only one digit. Last digit

KOZ6.0 6,300 Reputation points

2024-06-14T08:30:55.13+00:00

The leading A will be ignored.

It may be easier to understand if you think of mask="0123456789" input="08" Step=1 next="9".

If you want next="09" try this code:

public static string IncreaseByStep(string mask, string str, int step) { return GetString(mask, GetInteger(mask, str) + step, str.Length); } public static int GetInteger(string mask, string str) { if (str == null) { return 0; } int baseValue = 1; int intValue = 0; for (int i = str.Length - 1; i >= 0; i--) { char c = str[i]; int index = mask.IndexOf(c); if (index == -1) { throw new ArgumentOutOfRangeException(); } intValue += index * baseValue; baseValue *= mask.Length; } return intValue; } public static string GetString(string mask, int value, int length) { if (value < 0) { throw new ArgumentOutOfRangeException(); } int baseValue = mask.Length; var sb = new StringBuilder(); while (value > 0 || sb.Length < length) { int tmp = value / baseValue; int index = value - tmp * baseValue; char c = mask[index]; sb.Insert(0, c); value = tmp; } return sb.ToString(); }

Noah Aas 360 Reputation points

2024-06-14T19:56:30.6233333+00:00

Works not ZZ --> AAA

HEX is working

HEX is working

The original question doesn't work with the code.

Then I can't compare HEX with the mask and have to calculate differently depending on the requirements. What do you think about that?

Have a nice weekend and thanks.

KOZ6.0 6,300 Reputation points

2024-06-15T02:18:51.23+00:00

It is impossible to implement different specifications with a single type of code. Whether to automatically switch based on the mask string or to let the user choose, that is for you (or your customer) to decide.

Noah Aas 360 Reputation points

2024-06-18T08:27:27.4666667+00:00

I will clarify it again with my customer and then provide the solution. Your solution seems to me to be the best for my customer. Thank you.
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1 additional answer

Hongrui Yu-MSFT 785 Microsoft Vendor

Hi,@Noah Aas.

For the issue of IndexOutOfRangeException , you could update the code in GetRawValue as follows:


if (k + index > Mask_range.Length - 1)

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Noah Aas 360

I change this.


if (k + index >= Mask_range.Length - 1)
{
	char next_c = result.Length == 0 ? Mask_range[0 + index - Mask_range.Length + k] : Mask_range[0];
	result = next_c + result;
	isOverflow = true;
	isCarryOverLastCharacter = true;

if (k + index > Mask_range.Length - 1)
{
	char next_c = result.Length == 0 ? Mask_range[0 + index - Mask_range.Length + k] : Mask_range[0];
	result = next_c + result;
	isOverflow = true;
	isCarryOverLastCharacter = true;

is not working. System.IndexOutOfRangeException What you change it?

Hongrui Yu-MSFT 785 Microsoft Vendor

Hi,@Noah Aas.

According to the test, after the above modification, the addition with a step length of 1 can be run.

The GetNewValue method has a rigid carry and cannot be easily changed. So I can only write another method

Design idea: Represent input data with index ,and convert input data and step length into 24-base numbers for addition and subtraction(can be realised)


string GetValue(string input, int index)

{

    string Mask_range = "ABCDEFGHJKLMNPQRSTUVWXYZ";  //The length is 24

    int maxBit = Mask_range.Length; //maxBit : 24 - bit

 

 

    List<int> number1 = new List<int>();  //The data composed of indices represents the input value

    for (int i=input.Length-1;i>=0;i--)

    {

        number1.Add(Mask_range.IndexOf(input[i]));

    }

 

 

    List<int> number2 = new List<int>(); //Represent the step length as a 24-base List

    while (true)

    {

        number2.Add(index % maxBit);

        index = (int)(index / maxBit);

        if (index==0)

        {

            break;

        } 

    }

 

    List<int> temp;   //Perform base 24 addition operations

    if (number1.Count >= number2.Count)

    {

        temp = Add(number2, number1, maxBit);

    }

    else

    {

        for(int i=number1.Count;i<number2.Count;i++)   //Solve the problem that Mask_range has no data representing 0(If you delete this sentence, you will see that A+24=BA but not AA)

        {

            number1.Add(-1);

        }

        temp = Add(number1, number2, maxBit);

    }

 

    string result = "";  //Each bit is converted back to a string using the index

    foreach (int item in temp)

    {

        result = result + Mask_range[item];

    }

 

 

    return result;

}

 

List<int> Add(List<int> number_Short, List<int> number_Long,int maxBit)

{

    List<int> result = new List<int>();

    int overflow = 0;  //Indicates carry

    int i = 0;

    for(; i < number_Short.Count;i++)

    {

        result.Insert(0,(number_Short[i] + number_Long[i] + overflow) % maxBit);

        overflow = (int)((number_Short[i] + number_Long[i]) / maxBit);

    }

 

    for (; i < number_Long.Count;i++)

    {

        result.Insert(0, (0 + number_Long[i] + overflow) % maxBit);

        overflow = (int)(( number_Long[i] + overflow) / maxBit);

    }

   

    if(overflow>0)

    {

        result.Insert(0,overflow-1);

    }

 

    return result;

 

}

Noah Aas 360 Reputation points

2024-06-14T19:58:51.69+00:00

Thanks, I will check it soon.
Hongrui Yu-MSFT 785 Reputation points Microsoft Vendor

2024-06-17T08:06:50.99+00:00

Hi,@Noah Aas.

Have you checked my solution? Did my answer solve your problem? If so, you could accept it as the answer. It's helpful for community members with related questions.
Noah Aas 360 Reputation points

2024-06-18T08:26:05.56+00:00

Hello, Thanks a lot. Works. KOZ6.0 way seems better to me in this case.

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convert letters increase by step

1 additional answer