Деление строки на подстроки

AnsiString var1 = string1.SubString(0,string1.Pos("|")-1);

#include <iostream>
#include <string>
#include <sstream>
        
int main() {
   std::string s("Hello  world !!!");
   std::istringstream buf(s);
   std::string temp;
        
   while ( buf >> temp )
      std::cout << temp << std::endl;
                         
   return 0;
}

#include <iostream>
#include <string>
#include <vector>
#include <iterator>
 
std::vector<std::string> strtok(const std::string , const std::string );
 
int main()
{
    std::string s(",Hello  world,!!!");
    std::string d (" ,.");
    std::vector<std::string> v;
    
    v = strtok (s, d);
    std::copy(v.begin(), v.end(), std::ostream_iterator<std::string>(std::cout, "\n"));
 
    return 0;
}
 
std::vector<std::string> strtok(const std::string s, const std::string DELIM)
{
    std::vector<std::string> v;
    std::string tmp;
    size_t l, r;
 
    for ( l = s.find_first_not_of(DELIM), r = s.find_first_of(DELIM, l) ; 
        l != std::string::npos ; l = s.find_first_not_of(DELIM, r), r = s.find_first_of(DELIM, l) )
    {
        tmp = s.substr(l, r - l);
        v.push_back(tmp);
    }
    return v;
}

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>
#include <iterator>
 
int split_string_to_vector(const std::string & str, std::vector<std::string> & vec, const char sep){
    std::istringstream ist(str);
    std::string tmp;
    
    vec.clear();
    while ( std::getline(ist, tmp, sep) )
        vec.push_back(tmp);
    
    return vec.size();
}
 
 
int main(){
    const char SEP = '|';
    std::string str;
    std::vector<std::string> vec;
 
    while ( std::cout << "String: " && std::getline(std::cin, str) && ! str.empty() ){
        std::cout << split_string_to_vector(str, vec, SEP) << " tokens:" << std::endl;
        std::copy(vec.begin(), vec.end(), std::ostream_iterator<std::string>(std::cout, "\n"));
    }
 
    return 0;
}

#include <iostream>
#include <boost/algorithm/string.hpp>
#include <vector>
#include <iterator>
 
int main()
{
    std::string str = "one|two three-four";
    std::vector< std::string > words;
    boost::split( words, str, boost::is_any_of(" \t|-"), boost::token_compress_on );
    std::copy( words.begin(), words.end(), std::ostream_iterator< std::string > (std::cout, "\n") );        
}

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iterator>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
 
 
int main()
{
   std::string s("Hello|  world|A B");
   std::vector<std::string> v;
   
   boost::split(v, s, boost::is_any_of("|"));
   std::copy(v.begin(), v.end(), std::ostream_iterator<std::string>(std::cout, "\n"));
 
   return 0;
}

QStringList split ( const QString & sep, SplitBehavior behavior = KeepEmptyParts, Qt::CaseSensitivity cs = Qt::CaseSensitive ) const