boost 分析命令行参数

#include <boost/program_options.hpp>#include <iostream>#include <vector>using namespace std;using namespace  boost::program_options;int main(int argc, char* argv[]){  string one ; // 外部变量 存储 参数one的值  vector<string> mult;  boost::program_options::options_description opts("test options");  opts.add_options()    ("help,h","help info")    ("test1,t",value<string>(),"test aaa ")    ("one,o",value<string>(&one)->default_value("one"),"test one default") // 默认值     ("mult,m",value<vector<string> >(&mult)->multitoken(),"mult test"); //多个参数  variables_map vm;  try  {    store(parse_command_line(argc,argv,opts),vm); // 分析参数  }  catch(boost::program_options::error_with_no_option_name &ex)  {    cout<<ex.what()<<endl;  }  notify(vm); // 将解析的结果存储到外部变量  if (vm.count("help"))  {    cout<<opts<<endl;    return -1;  }  if(vm.count("test1"))  {   cout<<vm["test1"].as<string>()<<endl;  }    cout<<one<<endl;  cout<<mult.size()<<endl;    getchar();  return 0;}

[root@localhost test4]# g++ main.cpp  -l boost_program_options
[root@localhost test4]# ./a.out  -h
test options:
  -h [ --help ]           help info
  -t [ --test1 ] arg      test aaa 
  -o [ --one ] arg (=one) test one default
  -m [ --mult ] arg       mult test


[root@localhost test4]# ./a.out  -m f2 f3 f4 --test1 testbbbb
testbbbb
one
3