How to resolve the algorithm XML/Output step by step in the C++ programming language

Published on 7 June 2024 03:52 AM
#cpp

How to resolve the algorithm XML/Output step by step in the C++ programming language

Table of Contents

Problem Statement

Create a function that takes a list of character names and a list of corresponding remarks and returns an XML document of elements each with a name attributes and each enclosing its remarks. All elements are to be enclosed in turn, in an outer element. As an example, calling the function with the three names of: And three remarks of: Should produce the XML (but not necessarily with the indentation): The document may include an declaration and document type declaration, but these are optional. If attempting this task by direct string manipulation, the implementation must include code to perform entity substitution for the characters that have entities defined in the XML 1.0 specification. Note: the example is chosen to show correct escaping of XML strings. Note too that although the task is written to take two lists of corresponding data, a single mapping/hash/dictionary of names to remarks is also acceptable. Note to editors: Program output with escaped characters will be viewed as the character on the page so you need to 'escape-the-escapes' to make the RC entry display what would be shown in a plain text viewer (See this). Alternately, output can be placed in tags without any special treatment.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm XML/Output step by step in the C++ programming language

The code starts by including some header files, including <vector>, <utility>, <iostream>, and <boost/algorithm/string.hpp>.

The create_xml() function is defined, which takes two vectors of strings as parameters, names and remarks.

The main() function creates two vectors of strings, names and remarks, and pushes some data into them.

The create_xml() function is then called with the names and remarks vectors as arguments, and the resulting XML string is printed to the console.

The create_xml() function first creates a vector of pairs of strings, entities, which maps HTML entities to their corresponding XML entities.

The function then loops through the names vector and replaces any occurrences of the HTML entities with their corresponding XML entities. The same is done for the remarks vector.

Finally, the function loops through the names vector and creates an XML string for each name and its corresponding remark. The XML string is returned at the end of the function.

Source code in the cpp programming language

#include <vector>
#include <utility>
#include <iostream>
#include <boost/algorithm/string.hpp>

std::string create_xml( std::vector<std::string> & ,std::vector<std::string> & ) ;

int main( ) {
   std::vector<std::string> names , remarks ;
   names.push_back( "April" ) ;
   names.push_back( "Tam O'Shantor" ) ;
   names.push_back ( "Emily" ) ;
   remarks.push_back( "Bubbly, I'm > Tam and <= Emily" ) ;
   remarks.push_back( "Burns: \"When chapman billies leave the street ...\"" ) ;
   remarks.push_back( "Short & shrift" ) ;
   std::cout << "This is in XML:\n" ;
   std::cout << create_xml( names , remarks ) << std::endl ;
   return 0 ;
}

std::string create_xml( std::vector<std::string> & names ,
      std::vector<std::string> & remarks ) {
   std::vector<std::pair<std::string , std::string> > entities ;
   entities.push_back( std::make_pair( "&" , "&amp;" ) ) ;
   entities.push_back( std::make_pair( "<" , "&lt;" ) ) ;
   entities.push_back( std::make_pair( ">" , "&gt;" ) ) ;
   std::string xmlstring ( "<CharacterRemarks>\n" ) ;
   std::vector<std::string>::iterator vsi = names.begin( ) ;
   typedef std::vector<std::pair<std::string , std::string> >::iterator Vpss ;
   for ( ; vsi != names.end( ) ; vsi++ ) {
      for ( Vpss vs = entities.begin( ) ; vs != entities.end( ) ; vs++ ) {
	 boost::replace_all ( *vsi , vs->first , vs->second ) ;
      }
   }
   for ( vsi = remarks.begin( ) ; vsi != remarks.end( ) ; vsi++ ) {
      for ( Vpss vs = entities.begin( ) ; vs != entities.end( ) ; vs++ ) {
	 boost::replace_all ( *vsi , vs->first , vs->second ) ;
      }
   }
   for ( int i = 0 ; i < names.size( ) ; i++ ) {
      xmlstring.append( "\t<Character name=\"").append( names[ i ] ).append( "\">")
	 .append( remarks[ i ] ).append( "</Character>\n" ) ;
   }
   xmlstring.append( "</CharacterRemarks>" ) ;
   return xmlstring ;
}

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