10-23.cpp

#include <iostream>
#include <string>

using std::string;

string getPathName(const string& s) {

   char sep = '/';

#ifdef _WIN32
   sep = '\\';
#endif

   size_t i = s.rfind(sep, s.length( ));
   if (i != string::npos) {
      return(s.substr(0, i));
   }

   return("");
}

int main(int argc, char** argv) {

   string path = argv[1];

   std::cout << "The path name is \"" << getPathName(path) << "\"\n";
}