filtering a string in c

Question

Given the input ~Zw~~"iE^L I should get !w~"iE^L instead I am getting Zw~"iE^L

So it catch the ~~ just fine and replace it with ~ but I want to replace ~Z with !

Any ideas?

  for (j = 0; j < dataCharCount; j++, k++)
  {
    if (inputData[j] == '~' && inputData[j + 1] == '~')
    {
      filteredInputData[k] = '~';
      j++;
    }
    else if (inputData[j] == '~' && inputData[j + 1] == 'Z')
    {
      filteredInputData[k] = '!';
      j++;

    }
    filteredInputData[k] = inputData[j];
  }

you could have found the problem by using your debugger...

Adrien Plisson
– Adrien Plisson

2011-03-20 17:59:09 +00:00
Commented Mar 20, 2011 at 17:59 — Adrien Plisson
– Adrien Plisson, Commented Mar 20, 2011 at 17:59

Erik · Accepted Answer · 2011-03-20 17:53:56Z

3

} else {
    filteredInputData[k] = inputData[j];
}

Without the else you're overwriting filteredInputData[k] after the if statements.

answered Mar 20, 2011 at 17:53

Erik

91.8k13 gold badges203 silver badges192 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Adrien Plisson · Accepted Answer · 2011-03-20 17:58:08Z

0

there is an else missing before the last ine of the function. you surely do not want to copy the input to the output (filteredInputData[k] = inputData[j];) after having performed the replacement.

answered Mar 20, 2011 at 17:58

Adrien Plisson

23.4k7 gold badges45 silver badges76 bronze badges

Comments

Carl Norum · Accepted Answer · 2011-03-20 17:58:50Z

0

The last statement in your loop overwrites the ~ or ! you wrote via your if statment body. The reason it looks like it works for the ~~ is that it's overwriting the ~ with another ~. In the ~Z case, you're overwriting your ! with the Z. Step through your code with a debugger - you'll see what's happening immediately.

answered Mar 20, 2011 at 17:58

Carl Norum

226k42 gold badges442 silver badges480 bronze badges

Collectives™ on Stack Overflow

filtering a string in c

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related