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Thread: erase

  1. #1
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    Default erase

    BigInteger PowerOfTwo = BigInteger.valueOf(2);
              DecimalToBinary = new BigInteger(LargeBase.getText());
              String binaryString = DecimalToBinary.toString(2);
              int binaryNo = Integer.parseInt(binaryString, 2); 
    	  String backTOString = Integer.toBinaryString(binaryNo);
              char[] binaryArray = backTOString.toCharArray();
              int FristCount=0;int SecCount=0;
              for (char c : binaryArray){
                  if(c == 49){ // int i=c; will convter to ascii, so 1=49, 0=48.
     
                      display.setText(display.getText()+" "+PowerOfTwo+"^"+FristCount+" + ");}
                      FristCount++;
          }
    this code is working, however the print out want to be 2+2.
    However the print out come as 2+2+.
    How to earse the last part of +
    so come it will cone out like 2+2.


  2. #2
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    Default Re: erase

    It might help if you explained what the code is supposed to be doing...

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: erase

    display.setText(display.getText()+" "+PowerOfTwo+"^"+FristCount+" + ");}
    Is this the code that adds the ending +?
    You need change the logic to put the + at the beginning of the concatenation vs at the end as you have here.

  4. #4
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    Default Re: erase

    Your code will always print an extra " + ", you can't just erase it.
    You can fix this by putting in an if() statement to check if there is more numbers to output.

    if(c == 49){ // int i=c; will convter to ascii, so 1=49, 0=48.

    display.setText(display.getText()+" "+PowerOfTwo+"^"+FristCount);
    if( //more to print)
    display(" + ");
    }

    FristCount++;

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: erase

    Why not use:
    if(c == '1')

  6. #6
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    Default Re: erase

    Quote Originally Posted by Norm View Post
    Why not use:
    if(c == '1')
    c is char, when char convert to int. it will change to 49, when char is 1.

  7. #7
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    Default Re: erase

    Quote Originally Posted by firebluetom View Post
    Your code will always print an extra " + ", you can't just erase it.
    You can fix this by putting in an if() statement to check if there is more numbers to output.

    if(c == 49){ // int i=c; will convter to ascii, so 1=49, 0=48.

    display.setText(display.getText()+" "+PowerOfTwo+"^"+FristCount);
    if( //more to print)
    display(" + ");
    }

    FristCount++;
    how to use if statement to check?