Dear advanced boost/c/g++ programers:   I copied and try a simple (Reading a directory with boost) program , from page 383, Example 10-19, of book(C++ cookbook) ----------you can download the code to try by yourself at, http://examples.oreilly.com/9780596007614/ // Example 10-19.  Reading a directory #include <iostream> #include <cstdlib> #include <boost/filesystem/operations.hpp> #include <boost/filesystem/fstream.hpp> using namespace boost::filesystem; int main(int argc, char** argv) {    if (argc < 2) {       std::cerr << "Usage: " << argv[0] << " [dir name]\n";       return(EXIT_FAILURE);    }    path fullPath =      // Create the full, absolute path name      system_complete(path(argv[1]));    if (!exists(fullPath)) {       std::cerr << "Error: the directory " << fullPath.string()                 << " does not exist.\n";       return(EXIT_FAILURE);    }    if (!is_directory(fullPath)) {       std::cout << fullPath.string() << " is not a directory!\n";       return(EXIT_SUCCESS);    }    directory_iterator end;    for (directory_iterator it(fullPath);         it != end; ++it) {          // Iterate through each                                     // element in the dir,       std::cout << it->leaf();      // almost as you would       if (is_directory(*it))        // an STL container          std::cout << " (dir)";          std::cout << '\n';       }       return(EXIT_SUCCESS); } ----------------------------------------------------------------------------- my compiler g++ 4.5.2 not pass it, even I link --------- eric@eric-laptop:~/cppcookbook/ch10$ g++ -lboost_system -lboost_filesystem Example10-19.cpp Example10-19.cpp: In function ‘int main(int, char**)’: Example10-19.cpp:34:24: error: ‘class boost::filesystem3::directory_entry’ has no member named ‘leaf’ eric@eric-laptop:~/cppcookbook/ch10$ --------- I am using 1.46.1 of boost looking to hear from your help and thanks a lot in advance, Eric