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Join Date: Apr 2009

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mat1989

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c++ count html tags

Apr 5th, 2009

Hi guys.

Im doing an assignment, I am getting on ok with it but I am sadly really stuck at the moment.

The part I am stuck on involves counting html tags in a text file. I have thought of a method of doing this but unfortunately I have no idea how to implement it into the code. My idea is to look for the start symbol of the tag( <) then the contents, then the end symbol (>) Does anyone know how I could do this in c++?

Many thanks

Mat

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tux4life

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Re: c++ count html tags

Apr 5th, 2009

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 ...

Last edited by tux4life; Apr 5th, 2009 at 6:11 pm.

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Re: c++ count html tags

Apr 5th, 2009

probably something like this:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
std::string str = "<html>";
if( str.find("<") != string::npos && str.find(">") != string::npos)
{
    // most likely an html tag
}
std::string str = "<html>";
if( str.find("<") != string::npos && str.find(">") != string::npos)
{
    // most likely an html tag
}

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Join Date: Apr 2009

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mat1989

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Re: c++ count html tags

Apr 5th, 2009

Thanks alot guys

i'll try these ideas out.

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mat1989

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Re: c++ count html tags

Apr 5th, 2009

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

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Re: c++ count html tags

Apr 5th, 2009

Show us the code, with CODE TAGS.

Last edited by MosaicFuneral; Apr 5th, 2009 at 6:57 pm.

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mat1989

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Re: c++ count html tags

Apr 5th, 2009

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
// 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;
}
// 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.

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Re: c++ count html tags

Apr 5th, 2009

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

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
std::string line;
while( getline(ipfile, line) )
{
   // blabla
}
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 "<html>" can not be split between lines, so it doesn't make any sense to read the html file one character at a time.

Last edited by Ancient Dragon; Apr 5th, 2009 at 7:16 pm.

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mat1989

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Re: c++ count html tags

Apr 5th, 2009

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

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Re: c++ count html tags

#10

Apr 5th, 2009

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.

Last edited by Ancient Dragon; Apr 5th, 2009 at 7:19 pm.

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