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Thread: Yo anyone who knows code and stuff

  1. #1
    Registered Users Regular Flaming Flamingo's Avatar
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    Default Yo anyone who knows code and stuff

    I cannot figure out what the problem with this is. It is supposed to count the number of e's in a sentence but it keeps going into infinite loops every time I try to run it.

    public class wordStuff
    {
    public static int countEs(String sent)
    {
    int numE=0;
    int oneUPe=0;

    while(sent.substring(oneUPe,sent.length()).indexOf ("e")>=0)
    {
    numE++;
    oneUPe=sent.substring(oneUPe,sent.length()).indexO f("e")+1;
    }
    return numE;
    }
    public static void main(String []args)
    {
    System.out.print(countEs("cheese"));
    }
    }

  2. #2
    Defenestration is imminent pichubro's Avatar
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    Default

    because you are using a while loop, which are known to do infinite loops if you aren't careful.

    Try using a for loop instead.

  3. #3
    Registered Users Regular Flaming Flamingo's Avatar
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    Default

    but this doesn't work either.

    public class wordStuff
    {
    public static int countEs(String sent)
    {
    int numE=0;

    for(int oneUPe=0; oneUPe<sent.length(); )
    {
    if(sent.substring(oneUPe,sent.length()).indexOf("e ")>=0)
    {
    numE++;
    oneUPe=sent.substring(oneUPe,sent.length()).indexO f("e")+1;
    }
    else
    {
    oneUPe=sent.length();
    }
    }
    return numE;
    }
    public static void main(String []args)
    {
    System.out.print(countEs("cheese"));
    }
    }

  4. #4
    Registered Users Regular Flaming Flamingo's Avatar
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    Default

    I think I've got it

  5. #5
    princeso Kirby's Avatar
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    Default

    hmm

    why do you make your letter counter equal to the length counter if the letter is not e, why aren't you just adding the letter counter (up I think) by one each time

  6. #6
    Registered Users Regular Flaming Flamingo's Avatar
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    All I needed to do was add this to this line.

    oneUPe=sent.substring(oneUPe,sent.length()).indexO f("e")+1;

    oneUPe=sent.substring(oneUPe,sent.length()).indexO f("e")+oneUPe+1;

    or I could do this

    oneUPe+=sent.substring(oneUPe,sent.length()).indexO f("e")+1;

    now it works fine

    public class wordStuff
    {
    public static int countEs(String sent)
    {
    int numE=0;
    int oneUPe=0;

    while(sent.substring(oneUPe,sent.length()).indexOf ("e")>=0)
    {
    numE++;
    oneUPe=sent.substring(oneUPe,sent.length()).indexO f("e")+oneUPe+1;
    }
    return numE;
    }
    public static void main(String []args)
    {
    System.out.print(countEs("cheese"));
    }
    }
    Last edited by Flaming Flamingo; 02-19-2013 at 04:10 PM.

  7. #7
    Registered Users Regular Rayne's Avatar
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    Default

    There's an easier way to do this. Convert the string to a character array using String.toCharArray() and then iterate through it, incrementing a counter whenever you find an 'e'.

  8. #8
    The One and Only trixie's Avatar
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    Default

    I'd have just used a character array to begin with.
    Originally made by LM:


    ~ I have said nothing because there is nothing I can say that would describe how I feel as perfectly as you deserve it. -- Kyle Schmidt ~

    ~Silence is one of the hardest arguments to refute. -- Josh Billings ~

    * dragon_berry**Fallen_Wings*

  9. #9
    Registered Users Regular Flaming Flamingo's Avatar
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    Default

    We're only supposed to use the methods on a key that we get for the AP test.

  10. #10
    Registered Users Regular Rayne's Avatar
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    Default

    That's really dumb.

  11. #11
    bye felicia stiles's Avatar
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    Default

    damn, i still havent even taken a computer science course. im still catching up on prereqs lol... college is going to take me forever
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