c++ count html tags

Newbie Poster

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You could just go through the file and when your program comes across a '<' it should just ignore everything after it until it comes across a '>', at that point you've to count a tag ...

tux4life

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probably something like this:

std::string str = "<html>";
if( str.find("<") != string::npos && str.find(">") != string::npos)
{
    // most likely an html tag
}

Retired & Loving It

Team Colleague

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Thanks alot guys :) i'll try these ideas out.

Newbie Poster

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Dragon I had a stab at using your technique but it returns a random number of tags in the output. :(

Newbie Poster

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Show us the code, with CODE TAGS.

MosaicFuneral

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// assignment program 
// read file and copy to another
// count amount of charecters,lines, comments and tags
// change Xhtml tags from upper case to lower case
// place in new file 

#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <iomanip> 
#include <cctype>
using namespace std;

int main()
{
string file1,file2;
string str = "<>"; 
ifstream ipfile;
ofstream opfile;
char c;



int amountline = 0;
int amountcha = 0;
int amounttag = 0;
int amountcomment = 0;
cout <<  "Please enter the name of the file you wish to check" << endl;
cin >> file1;


ipfile.open(file1.c_str());


if (!ipfile.is_open())

{
	cout << "Oops! Couldn't open " << file1 << "!\n"<<endl;

	return 1;

}
 
{

cout << " Please enter the file you wish the edited contents to be copied to" << endl;
cout << " This will be created if it does not already exist"<< endl; 
cin >> file2;
}

opfile.open(file2.c_str());


while (!ipfile.eof())

{	

ipfile.get(c);
opfile << c;


		

		if(c!='\n' && !ipfile.eof() && c!=' ')
		{
			amountcha++;
		}
		if(c=='\n')
		{
			amountline++;
		}

	 if( str.find("<") != string::npos && str.find(">") != string::npos)
{
    amounttag++;
}

   
      if ( c == '!')
      {
      amountcomment++;
      }
  

  









cout << " This file contains :" << amountline << " lines" << endl;
cout << " This file contains :" << amountcha << " charecters" << endl;
cout << " this file has : " << amountcomment<<  " comments " << endl;
cout << " This file contains  : " << amounttag << "tags"   << endl; 

cout << " Copy complete, edited code located in " << file2 << endl;



return 0;
}

thats all my code so far.

Newbie Poster

8 posts since Apr 2009

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why not just use getline() to read an entire line at one time?

std::string line;
while( getline(ipfile, line) )
{
   // blabla
}

I don't do html coding, but I think any given tag must be on one line, such as "" can not be split between lines, so it doesn't make any sense to read the html file one character at a time.

Retired & Loving It

Team Colleague

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I can use getline to search for html tags in the line?

Newbie Poster

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you use getline() to read an entire line that is terminated with '\n'. Then use string::find() to look for < and > characters as shown in previous example code.

Also note that ipfile.eof() is not needed in my loop because the loop stops on error or end-of-file.

Retired & Loving It

Team Colleague

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You could tokenize (strtok) by "<" and stick each piece into a vector or so... then get it's size().

Comatose

Taboo Programmer

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You could tokenize (strtok) by "<" and stick each piece into a vector or so... then get it's size().

That sounds like the hard way. strtok() embeds NULLs in the string, which might corrupt the std::string class.

Retired & Loving It

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http://haacked.com/archive/2004/10/25/usingregularexpressionstomatchhtml.aspx

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0

>You could tokenize (strtok) by "<" and stick each piece into a vector or so... then get it's size().

Best not to mix c with c++. Naughty naughty :-0

In any case all these suggestions are too niave. There are a few examples which will slip through the loop, (html attributes)

So using regular expressions, would be the best way to deal with this however, if this is homework your professor is unlikely to care.

iamthwee

Posting Expert

5,950 posts since Aug 2005

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I got it working guys :) Code I used below :

if (c=='<' )

	 {
		 
		istag = true;

	 }

	 if (c== '>' && istag == true)

	 {

amounttag++;
istag = false; 
	 }




if (c== '!')

{

	iscomment = true; 

}

if ( c== '-' && iscomment == true)
{
amountcomment++;
amounttag --;
iscomment = false; 

}

works a treat :) , Thanks for all your help.

Newbie Poster

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