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Help with indenting infile -> outfile paragraph...

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Join Date: Mar 2007

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R6er

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Re: Help with indenting infile -> outfile paragraph...

#11

Mar 26th, 2007

Back to the drawing board.
There must be a way of accomplishing this task by simply using a if statement with something along the lines of "if not new line read, else indent"

Here is what Im working with now and it doesnt seem to be doing much of anything but reading and spitting out the file:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
string inputStr;
 while(inFile)
   {
    getline(inFile,inputStr);
 
    if (!'\n')
     {
       outFile << "     " << inputStr << endl;
     }
    else
     {
       outFile << inputStr << endl;
     }
   }
string inputStr;
 while(inFile)
   {
    getline(inFile,inputStr);

    if (!'\n')
     {
       outFile << "     " << inputStr << endl;
     }
    else
     {
       outFile << inputStr << endl;
     }
   }

Any ideas?
Thank you

Last edited by R6er; Mar 26th, 2007 at 10:36 pm.

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Re: Help with indenting infile -> outfile paragraph...

#12

Mar 26th, 2007

I don't know what you are trying to achieve by doing if(!'\n'). This condition will never be true hence the whole file is given out as it is.

Also the trouble with this approach is that even lines which are not preceded by newlines but have indentations will always look indented. So you would have no way of knowing which lines were indented by the algorithm or which lines were indented from the start.

For proper formatting, trimming is a must.

Last edited by ~s.o.s~; Mar 26th, 2007 at 10:52 pm.

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Re: Help with indenting infile -> outfile paragraph...

#13

Mar 26th, 2007

I did do alot of reading on trimming which I did not know before to educate myself and I then explained to my teacher what I have all learned about trimming when I presented the solution to him.

He then explained to me that he has not yet tought us trimming and that there is a way to solve the problem with all the he had tought us thus far (which isnt much at all).

He then gave me the hint that I needed to use the newline character to denote the starting up of a new paragraph.

I have been trying so many variations of this while/If/else statement, which seems right with the new line character to no avail.

I am still searching my book and the inet inorder to come up with a solution at the moment.

There must be a way somehow and I will bet that it is petty simple, I just have not found it yet.

Let me know if any of you have any hints that I may be able to use in solving this problem.

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Re: Help with indenting infile -> outfile paragraph...

#14

Mar 26th, 2007

Have you been taught the find function in C++? If so then you can search the string for the character which doesn't belong to the family of whitespace characters. If you find one, write the line as it is, and if no character other than whitespace character is found (indicates blank line) just indent and move on to the next line.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
//check for a blank line
if(find_first_not_of(" \t\r\f\n\v") == string::npos)
{
     //write a indent to the new file
}
else
{
    // write the line as it is
}
//check for a blank line
if(find_first_not_of(" \t\r\f\n\v") == string::npos)
{
     //write a indent to the new file
}
else
{
    // write the line as it is
}

Last edited by ~s.o.s~; Mar 26th, 2007 at 11:35 pm.

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Re: Help with indenting infile -> outfile paragraph...

#15

Mar 26th, 2007

Interesting, but no we have not.

Im still plugging away to no avail YET.

Thanks for the thought.

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Re: Help with indenting infile -> outfile paragraph...

#16

Mar 26th, 2007

So I guess the only option left is to manually parse the string character by character and draw your own results. Best of luck.

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Re: Help with indenting infile -> outfile paragraph...

#17

Mar 26th, 2007

I am assuming you are talking about the get function.
Because I am expected to solve this using these basic resources, there must be a way of denoting a blank line that I have yet to find.

Thank you for your help, I appreciate it.

Last edited by R6er; Mar 27th, 2007 at 12:00 am.

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Re: Help with indenting infile -> outfile paragraph...

#18

Mar 28th, 2007

Another hint is to use a "state machine" to handle this problem.

The problem I am running into is finding the logic behind noting when there is a new line that contains characters as opposed to blank lines.

Please help!

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Re: Help with indenting infile -> outfile paragraph...

#19

Mar 28th, 2007

Like I said before, you need to read in the entire line in a string and start parsing it yourself, treating the string as an array of characters. For this, you will need functions which help you in determining whether a character is a space character or not. The function I am talking about is isspace().

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
 for(int i = 0; i < myString.size(); ++i)
{
    //means that the character is nonwhitespace, so the string must contain other characters
    if(isspace(myString[i]) == 0)
    {
         stringHasCharacters = true;
         break;
    }
}
 for(int i = 0; i < myString.size(); ++i)
{
    //means that the character is nonwhitespace, so the string must contain other characters
    if(isspace(myString[i]) == 0)
    {
         stringHasCharacters = true;
         break;
    }
}

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Re: Help with indenting infile -> outfile paragraph...

#20

Mar 28th, 2007

The thing was is that we havent learned that yet so I cannot use it, we have only used basic things.
It came to my head during lunch today and I got it.
The whole deal was the fact that "" || " " denoted a new line, yea as simple as it is, that was it. Heres the prog:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main ()
{
  ifstream inFile("file.txt1");
  ofstream outFile("file.txt2");
string inputStr;
string leadstr;
leadstr = "     ";
 while(inFile)
   {
    getline(inFile,inputStr);
    outFile << leadstr << inputStr << endl;
    if (inputStr == " " || inputStr == "")
     {
       leadstr = "     ";
     }
    else
     {
       leadstr = "";
     }
   }
 
  inFile.close();
  outFile.close();
  return 0;
}
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main ()
{
  ifstream inFile("file.txt1");
  ofstream outFile("file.txt2");
string inputStr;
string leadstr;
leadstr = "     ";
 while(inFile)
   {
    getline(inFile,inputStr);
    outFile << leadstr << inputStr << endl;
    if (inputStr == " " || inputStr == "")
     {
       leadstr = "     ";
     }
    else
     {
       leadstr = "";
     }
   }

  inFile.close();
  outFile.close();
  return 0;
}