#include <cstring>
#include <sstream>
#include <string>
#include <vector>
 
using namespace std;
 
class Split {
  vector<string> result;
public:
  Split( const string& s ) {
    stringstream sin( s );
    string temp;
 
    while ( sin >> temp ) {
      result.push_back( temp );
    }
  }
 
  vector<string> Result() const { return result; }
};
 
extern "C" {
  char **SplitString( const char *s ) {
    vector<string> temp = Split( s ).Result();
    char **result = new char*[temp.size() + 1];
 
    // Terminate the result array with a sentinel.
    result[temp.size()] = 0;
 
    for ( vector<string>::size_type i = 0; i < temp.size(); ++i ) {
      // Add a new C-string to the result array
      result[i] = new char[temp[i].length() + 1];
 
      // Initialize the new string from the temp result
      strcpy( result[i], temp[i].c_str() );
    }
 
    return result;
  }
}

#include <stdio.h>
 
extern char **SplitString( const char *s );
 
int main( void ) {
  char **p = SplitString( "this is a test" );
 
  while ( *p ) {
    printf( "%s\n", *p++ );
  }
 
  return 0;
}