#include <iostream>#include "crfpp.h"// c++ -O3 example.cpp -lcrfppint main(int argc, char **argv) {  // -v 3: access deep information like alpha,beta,prob  // -nN: enable nbest output. N should be >= 2  CRFPP::Tagger *tagger =    CRFPP::createTagger("-m model -v 3 -n2");  if (!tagger) {    std::cerr << CRFPP::getTaggerError() << std::endl;    return -1;  }  // clear internal context  tagger->clear();  // add context  tagger->add("Confidence NN");  tagger->add("in IN");  tagger->add("the DT");  tagger->add("pound NN");  tagger->add("is VBZ");  tagger->add("widely RB");  tagger->add("expected VBN");  tagger->add("to TO");  tagger->add("take VB");  tagger->add("another DT");  tagger->add("sharp JJ");  tagger->add("dive NN");  tagger->add("if IN");  tagger->add("trade NN");  tagger->add("figures NNS");  tagger->add("for IN");  tagger->add("September NNP");  std::cout << "column size: " << tagger->xsize() << std::endl;  std::cout << "token size: " << tagger->size() << std::endl;  std::cout << "tag size: " << tagger->ysize() << std::endl;  std::cout << "tagset information:" << std::endl;  for (size_t i = 0; i < tagger->ysize(); ++i) {    std::cout << "tag " << i << " " << tagger->yname(i) << std::endl;  }  // parse and change internal stated as 'parsed'  if (! tagger->parse()) return -1;  std::cout << "conditional prob=" << tagger->prob()            << " log(Z)=" << tagger->Z() << std::endl;  for (size_t i = 0; i < tagger->size(); ++i) {    for (size_t j = 0; j < tagger->xsize(); ++j) {      std::cout << tagger->x(i, j) << '\t';    }    std::cout << tagger->y2(i) << '\t';    std::cout << std::endl;    std::cout << "Details";    for (size_t j = 0; j < tagger->ysize(); ++j) {      std::cout << '\t' << tagger->yname(j) << "/prob=" << tagger->prob(i,j)                << "/alpha=" << tagger->alpha(i, j)                << "/beta=" << tagger->beta(i, j);    }    std::cout << std::endl;  }  // when -n20 is specified, you can access nbest outputs  std::cout << "nbest outputs:" << std::endl;  for (size_t n = 0; n < 10; ++n) {    if (! tagger->next()) break;    std::cout << "nbest n=" << n << "\tconditional prob=" << tagger->prob() << std::endl;    // you can access any information using tagger->y()...  }  std::cout << "Done" << std::endl;}