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May 18, 2012 18:37
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RapidXml example parsing beer journal
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<?xml version="1.0" encoding="utf-8"?> | |
<MyBeerJournal> | |
<Brewery name="Founders Brewing Company" location="Grand Rapids, MI"> | |
<Beer name="Centennial" description="IPA" rating="A+" dateSampled="01/02/2011"> | |
"What an excellent IPA. This is the most delicious beer I have ever tasted!" | |
</Beer> | |
</Brewery> | |
<Brewery name="Brewery Vivant" location="Grand Rapids, MI"> | |
<Beer name="Farmhouse Ale" description="Belgian Ale" rating="B" dateSampled="02/07/2015"> | |
This beer is not so good... but I am not that big of a fan of english style ales. | |
</Beer> | |
</Brewery> | |
<Brewery name="Bells Brewery" location="Kalamazoo, MI"> | |
<Beer name="Two Hearted Ale" description="IPA" rating="A" dateSampled="03/15/2012"> | |
Another execllent brew. Two Hearted gives Founders Centennial a run for it's money. | |
</Beer> | |
</Brewery> | |
</MyBeerJournal> |
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#include <string.h> | |
#include <stdio.h> | |
#include <iostream> | |
#include <fstream> | |
#include <vector> | |
#include "rapidxml-1.13/rapidxml.hpp" | |
using namespace rapidxml; | |
using namespace std; | |
int main(void) | |
{ | |
cout << "Parsing my beer journal..." << endl; | |
xml_document<> doc; | |
xml_node<> * root_node; | |
// Read the xml file into a vector | |
ifstream theFile ("beerJournal.xml"); | |
vector<char> buffer((istreambuf_iterator<char>(theFile)), istreambuf_iterator<char>()); | |
buffer.push_back('\0'); | |
// Parse the buffer using the xml file parsing library into doc | |
doc.parse<0>(&buffer[0]); | |
// Find our root node | |
root_node = doc.first_node("MyBeerJournal"); | |
// Iterate over the brewerys | |
for (xml_node<> * brewery_node = root_node->first_node("Brewery"); brewery_node; brewery_node = brewery_node->next_sibling()) | |
{ | |
printf("I have visited %s in %s. ", | |
brewery_node->first_attribute("name")->value(), | |
brewery_node->first_attribute("location")->value()); | |
// Interate over the beers | |
for(xml_node<> * beer_node = brewery_node->first_node("Beer"); beer_node; beer_node = beer_node->next_sibling()) | |
{ | |
printf("On %s, I tried their %s which is a %s. ", | |
beer_node->first_attribute("dateSampled")->value(), | |
beer_node->first_attribute("name")->value(), | |
beer_node->first_attribute("description")->value()); | |
printf("I gave it the following review: %s", beer_node->value()); | |
} | |
cout << endl; | |
} | |
} |
Do you realize that this crashes after entering the first "for", right?
I'm beginner in C++, but after compiling seems works fine
@benjallauro
Parsing my beer journal...
I have visited Founders Brewing Company in Grand Rapids, MI. On 01/02/2011, I tried their Centennial which is a IPA. I gave it the following review:
"What an excellent IPA. This is the most delicious beer I have ever tasted!"
I have visited Brewery Vivant in Grand Rapids, MI. On 02/07/2015, I tried their Farmhouse Ale which is a Belgian Ale. I gave it the following review:
This beer is not so good... but I am not that big of a fan of english style ales.
I have visited Bells Brewery in Kalamazoo, MI. On 03/15/2012, I tried their Two Hearted Ale which is a IPA. I gave it the following review:
Another execllent brew. Two Hearted gives Founders Centennial a run for it's money.
I have a xml which has data (which is my interest) at level 6 or 7. So how can I access them directly?
<?xml version="1.0"?>
<Root-tag xmlns:xsi="" xmlns:xsd="" schemaVersion="" xmlns="">
<Level2 fileType="" version="" typesetVersion="">
<Level31></Level31>
<Level32></Level32>
</Level2>
<Level21 version="" typeVersion="">
<Level34 xsi:type="" typeVersion="">
<Level4 xsi:type="" typeVersion="">
<Level5 xsi:type="">
<Level61>xx</Level61>
<Level62>xxx,xxx</Level62>
<Level63></Level63>
<Level64></Level64>
<Level65 typeVersion="">
<Level7></Level7>
</Level65>
</Level5>
</Level4>
</Level34>
</Level21>
</Root-tag>
@JSchaenzle could you please answer my question
I have some example to increase this post. My example is based on creation of scene referential with hierarchy.
XML file :
<?xml version="1.0" encoding="utf-8"?>
<WORLD>
<REF name="LocalRef_1">
<REF name="LocalRef_1_1">
<REF name="LocalRef_1_1_1">
</REF>
<REF name="LocalRef_1_1_2">
</REF>
<REF name="LocalRef_1_1_3">
</REF>
</REF>
</REF>
</WORLD>
My code to browse information :
for (rapidxml::xml_node<>* node = doc.first_node("WORLD")->first_node("REF"); node != nullptr; node = node->first_node())
{
cout << "A : " << node->first_attribute("name")->value() << endl;
for (rapidxml::xml_node<>* node2 = node; node2 != nullptr; node2 = node2->next_sibling())
{
cout << "B : " << node2->first_attribute("name")->value() <<endl;
}
}
My result:
A : LocalRef_1
B : LocalRef_1
A : LocalRef_1_1
B : LocalRef_1_1
A : LocalRef_1_1_1
B : LocalRef_1_1_1
B : LocalRef_1_1_2
B : LocalRef_1_1_3
Have fun ! :)
Excellent example.
Thank you.
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This is one of the best examples for the type of program I'm building. Thank you! But the best part of this is, these are all my favorite breweries.