substring

Question

divin757 8 Light Poster

13 Years Ago

i was sure this should be easy but here i am. i have a text file with information of the tones required to play the mario theme. i was needing to read line by line and break out the numbers and put them in a array. the problem is i dont know how many digits the numbers will be and as far as i know only a char has a test for if it is a digit. i tried selecting out one char at a time and testing but that didnt work. any ideas?

:beep frequency=660 length=80ms;
:delay 200ms;
:beep frequency=760 length=50ms;
:delay 150ms;
:beep frequency=860 length=100ms;
:delay 300ms;
.....

while((s = sr.ReadLine()) != null)
{
    if ((i = s.IndexOf("beep frequency=")) != -1)
    {
        for (int j = j + 15; ((char)s.Substring(j,1)).IsDigit ; j++)
        {
            //if it is a digit do some crazy stuff here                    
        }
    }
}

4 Contributors
6 Replies
125 Views
5 Months Discussion Span
Latest Post 13 Years Ago Latest Post by Xcelled194

darkagn 315 Veteran Poster

13 Years Ago

You could use the String.Split function to split each line according to where each space is. Then you could just substring from the = signs to get the digits. Something like this (untested but should give you an idea):

while ((s = sr.ReadLine()) != null)
{
  string[] chunks = s.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
  foreach (string part in chunks)
  {
    int i = part.IndexOf("=");
    if (i != -1)
    {
       int digit = Convert.ToInt32(part.Substring(i+1));
       // do something with digit...

    }
  }
}

unibraz 0 Newbie Poster

13 Years Ago

Does some program that creates those rules exist?

Friend how to extract that program that creates that!

Exemple:music super mario bross

:beep frequency=660 length=100ms;
:delay 150ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=510 length=100ms;
:delay 100ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=770 length=100ms;
:delay 550ms;
:beep frequency=380 length=100ms;
:delay 575ms;
:beep frequency=510 length=100ms;
:delay 450ms;
:beep frequency=380 length=100ms;
:delay 400ms;
:beep frequency=320 length=100ms;
:delay 500ms;
:beep frequency=440 length=100ms;
:delay 300ms;
:beep frequency=480 length=80ms;
:delay 330ms;
:beep frequency=450 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 200ms;
:beep frequency=660 length=80ms;
:delay 200ms;
:beep frequency=760 length=50ms;
:delay 150ms;
:beep frequency=860 length=100ms;
:delay 300ms;
:beep frequency=700 length=80ms;
:delay 150ms;
:beep frequency=760 length=50ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 300ms;
:beep frequency=520 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=480 length=80ms;
:delay 500ms;
:beep frequency=510 length=100ms;
:delay 450ms;
:beep frequency=380 length=100ms;
:delay 400ms;
:beep frequency=320 length=100ms;
:delay 500ms;
:beep frequency=440 length=100ms;
:delay 300ms;
:beep frequency=480 length=80ms;
:delay 330ms;
:beep frequency=450 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 200ms;
:beep frequency=660 length=80ms;
:delay 200ms;
:beep frequency=760 length=50ms;
:delay 150ms;
:beep frequency=860 length=100ms;
:delay 300ms;
:beep frequency=700 length=80ms;
:delay 150ms;
:beep frequency=760 length=50ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 300ms;
:beep frequency=520 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=480 length=80ms;
:delay 500ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 220ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=200ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 150ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 420ms;
:beep frequency=585 length=100ms;
:delay 450ms;
:beep frequency=550 length=100ms;
:delay 420ms;
:beep frequency=500 length=100ms;
:delay 360ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 220ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=200ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 150ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 420ms;
:beep frequency=585 length=100ms;
:delay 450ms;
:beep frequency=550 length=100ms;
:delay 420ms;
:beep frequency=500 length=100ms;
:delay 360ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=430 length=80ms;
:delay 150ms;
:beep frequency=380 length=80ms;
:delay 600ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=660 length=80ms;
:delay 550ms;
:beep frequency=870 length=80ms;
:delay 325ms;
:beep frequency=760 length=80ms;
:delay 600ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=430 length=80ms;
:delay 150ms;
:beep frequency=380 length=80ms;
:delay 600ms;
:beep frequency=660 length=100ms;
:delay 150ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=510 length=100ms;
:delay 100ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=770 length=100ms;
:delay 550ms;
:beep frequency=380 length=100ms;
:delay 575ms;

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divin757 8 Light Poster · Answer 1 · 2010-11-19T09:49:26+00:00

i guess i could do a 2 stage split. the first one on '=' and the second one one ' '. combined with some tryparsing i could make it work...

Xcelled194 28 Junior Poster in Training · Answer 2 · 2011-05-15T23:25:49+00:00

OK, well, this is actually very simple. Here is my example, it is a console appication and it uses a const string of the song paired with a StringReader. However, it should be very easy to adapt it to use a StreamReader.

class Program
    {
        const string Song = @":beep frequency=660 length=100ms;
:delay 150ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=510 length=100ms;
:delay 100ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=770 length=100ms;
:delay 550ms;
:beep frequency=380 length=100ms;
:delay 575ms;
:beep frequency=510 length=100ms;
:delay 450ms;
:beep frequency=380 length=100ms;
:delay 400ms;
:beep frequency=320 length=100ms;
:delay 500ms;
:beep frequency=440 length=100ms;
:delay 300ms;
:beep frequency=480 length=80ms;
:delay 330ms;
:beep frequency=450 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 200ms;
:beep frequency=660 length=80ms;
:delay 200ms;
:beep frequency=760 length=50ms;
:delay 150ms;
:beep frequency=860 length=100ms;
:delay 300ms;
:beep frequency=700 length=80ms;
:delay 150ms;
:beep frequency=760 length=50ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 300ms;
:beep frequency=520 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=480 length=80ms;
:delay 500ms;
:beep frequency=510 length=100ms;
:delay 450ms;
:beep frequency=380 length=100ms;
:delay 400ms;
:beep frequency=320 length=100ms;
:delay 500ms;
:beep frequency=440 length=100ms;
:delay 300ms;
:beep frequency=480 length=80ms;
:delay 330ms;
:beep frequency=450 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 200ms;
:beep frequency=660 length=80ms;
:delay 200ms;
:beep frequency=760 length=50ms;
:delay 150ms;
:beep frequency=860 length=100ms;
:delay 300ms;
:beep frequency=700 length=80ms;
:delay 150ms;
:beep frequency=760 length=50ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 300ms;
:beep frequency=520 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=480 length=80ms;
:delay 500ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 220ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=200ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 150ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 420ms;
:beep frequency=585 length=100ms;
:delay 450ms;
:beep frequency=550 length=100ms;
:delay 420ms;
:beep frequency=500 length=100ms;
:delay 360ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 220ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=200ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=1020 length=80ms;
:delay 150ms;
:beep frequency=1020 length=80ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=760 length=100ms;
:delay 100ms;
:beep frequency=720 length=100ms;
:delay 150ms;
:beep frequency=680 length=100ms;
:delay 150ms;
:beep frequency=620 length=150ms;
:delay 300ms;
:beep frequency=650 length=150ms;
:delay 300ms;
:beep frequency=380 length=100ms;
:delay 150ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=430 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 100ms;
:beep frequency=570 length=100ms;
:delay 420ms;
:beep frequency=585 length=100ms;
:delay 450ms;
:beep frequency=550 length=100ms;
:delay 420ms;
:beep frequency=500 length=100ms;
:delay 360ms;
:beep frequency=380 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=100ms;
:delay 150ms;
:beep frequency=500 length=100ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=430 length=80ms;
:delay 150ms;
:beep frequency=380 length=80ms;
:delay 600ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 150ms;
:beep frequency=660 length=80ms;
:delay 550ms;
:beep frequency=870 length=80ms;
:delay 325ms;
:beep frequency=760 length=80ms;
:delay 600ms;
:beep frequency=500 length=60ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=500 length=60ms;
:delay 350ms;
:beep frequency=500 length=80ms;
:delay 150ms;
:beep frequency=580 length=80ms;
:delay 350ms;
:beep frequency=660 length=80ms;
:delay 150ms;
:beep frequency=500 length=80ms;
:delay 300ms;
:beep frequency=430 length=80ms;
:delay 150ms;
:beep frequency=380 length=80ms;
:delay 600ms;
:beep frequency=660 length=100ms;
:delay 150ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=510 length=100ms;
:delay 100ms;
:beep frequency=660 length=100ms;
:delay 300ms;
:beep frequency=770 length=100ms;
:delay 550ms;
:beep frequency=380 length=100ms;
:delay 575ms; ";
        static void Main(string[] args)
        {
            System.IO.StringReader r = new System.IO.StringReader(Song);
            while (r.Peek() != -1)
            {
                string Instruction = r.ReadLine().Remove(0,1);
                Console.WriteLine(Instruction);
                if (Instruction.StartsWith("beep"))
                {
                    int start = Instruction.IndexOf('=') + 1;
                    int end = Instruction.IndexOf(' ', start);
                    int freq = int.Parse(Instruction.Substring(start, end - start));
                    start = Instruction.IndexOf('=', end) + 1;
                    end = Instruction.IndexOf('m', start);
                    int dur = int.Parse(Instruction.Substring(start, end - start));
                    Console.Beep(freq, dur);
                }
                else
                {
                    int start = Instruction.IndexOf(' ') + 1;
                    int end = Instruction.IndexOf('m', start);
                    int delay = int.Parse(Instruction.Substring(start, end - start));
                    System.Threading.Thread.Sleep(delay);
                }
            }
        }
    }

unibraz 0 Newbie Poster · Answer 3 · 2011-05-16T08:01:24+00:00

would like to know which programs does that. How to create tones of music

Xcelled194 28 Junior Poster in Training · Answer 4 · 2011-05-16T09:52:41+00:00

I suggest you make your own thread for that instead of hijacking this one.