Reading HTML text using C++

Question

I am currently reading book from Allex Allain and there is practice problem: enter image description here

And i dont know how to think about this problem and i am somehow stuck , should i first find every tag and save it to array or vector ? and then compare tags from vector with original string ? and make som conditions ? I dont looking for code from you i want to solve it by myself i am just looking for inspiration or some ideas , or some useful methods i could use. thank you.

Not a good idea to include an image of text. Cannot be searched nor useful on a mobile phone — Ed Heal, Dec 03 '15 at 19:05

score 1 · Answer 1 · edited Dec 08 '15 at 10:35

1

You should make a Parser.

Read each word and if you find tag then find the next <tag>. If this is the opposite tag </tag> then you could create object from that tag.

Solution proposed imply to create interface named tag and derived class named <html>, <head>.

So in final you will have a motor (parser) which eats text and produces object.

edited Dec 08 '15 at 10:35

Mr Lister

45,515
15
108
150

answered Dec 03 '15 at 19:07

MSD561

512
5
16

score 0 · Answer 2 · edited May 23 '17 at 12:16

0

Yes like @MSD561 he could write a parser. Either from scratch and reinvent the wheel, or use a library.

An XML-library can be used to achieve the second and get a better understanding for the structures:

What XML parser should I use in C++?

It will also provide you with all the entries for the tags etc and you'll just have to parse through the xml tree.

edited May 23 '17 at 12:16

Community

1
1

answered Dec 03 '15 at 19:15

mmoment

1,269
14
30

2

HTML is not guaranteed to be valid XML -- only XHTML is. If you want to use an XML parser on HTML you need to run it through a converter first, such as tidylib. – MrEricSir Dec 03 '15 at 19:47
@mmoment as I understand he is currently learning so it is makes sense to implement a basic parser in order to understand inner mechanisms. – MSD561 Jan 31 '19 at 19:09

score 0 · Answer 3 · edited Dec 24 '16 at 14:18

using namespace std;

void main ()
{
    ifstream x; 
    string name,head="<html><head></head><body><table>", tail="</table></body></html>", bodystart="<tr><td>",bodyclose="</td></tr>";
    ofstream y;
    x.open("example.txt");
    y.open("myhtmlfile.html");
    y<<head;
    while(!x.eof())
    {
        x>>name; 
        y<<bodystart<<name<<bodyclose;
    }
    y<<tail;

    x.close();
    cout<<"\n\n";
}

Reading HTML text using C++

3 Answers3