下載 tclap-1.2.1.tar.gz ， 然後解壓，將 tclap-1.2.1/include/tclap 複製到工程目錄下的 3rdParty 資料夾

新建 CMake 工程

• CMakeLists.txt

  cmake_minimum_required(VERSION 2.8)
  project( TclapDemo )
  
  include_directories( ${PROJECT_SOURCE_DIR}/3rdParty )
  
  add_executable( main main.cpp )

• main.cpp

   #include <iostream>
   #include <sstream>
   
  
  
   #include "tclap/CmdLine.h"
  
  //ostringstream 物件用來進行格式化的輸出，常用於將各種型別轉換為 string 型別
  //ostringstream 只支援 << 操作符
  template<typename T> std::string toString(const T& t){
      std::ostringstream oss;  //建立一個格式化輸出流
      oss<<t;                  //把值傳遞如流中
      return oss.str();   
  }
  
  //模板函式：將string型別變數轉換為常用的數值型別（此方法具有普遍適用性）  
   
  
  template <class Type>  
  Type stringToNum(const std::string& str){  
      istringstream iss(str);  
      Type num;  
      iss >> num;  
      return num;      
  }  
  
  int main(int argc,char** argv){
      try {
          // Define the command line object.
          TCLAP::CmdLine cmd("Command description message"
   
  , ' ', "0.1");
  
          TCLAP::ValueArg<std::string> nameArg("n", "name", "Name to print", false, "Tom", "std::string", cmd);  // Tom is the default value
  
          TCLAP::ValueArg<int> deviceIdArg("c", "cam", "Camera device id", false, 123, "integer", cmd); // 33 is the default value
  
          TCLAP::SwitchArg noShowOutputSw("", "no-show", "Don't show video", cmd, false);   // false is the default value
  
          TCLAP::ValueArg<double> deviceDataArg("d", "data", "data user defined", false, 2.3456, "double", cmd); // 33 is the default value
  
          TCLAP::ValueArg<std::string> initBbArg("b", "boundingbox", "Init Bounding Box", false, "-1,-1,-1,-1", "x,y,w,h", cmd);  // Tom is the default value
  
          // Parse the args.
          cmd.parse( argc, argv );
  
          std::string name = nameArg.getValue();
          std::cout << "My name is: " << name << std::endl;
  
          int camId = deviceIdArg.getValue();
          std::cout << "Camera ID is: " << camId << std::endl;
  
          bool bIsShowVideo = noShowOutputSw.getValue();
          std::cout << "The flag of showing video: " << bIsShowVideo << std::endl;
  
          double data = deviceDataArg.getValue();
          std::cout << "data is: " << data << std::endl;
  
          std::stringstream initBbSs(initBbArg.getValue());
          double initBb[4];
          for (int i = 0; i < 4; ++i)
          {
            std::string singleValueStr;
            getline(initBbSs, singleValueStr, ',');
            initBb[i] = stringToNum<double>(singleValueStr);
          }
          std::cout << "initBb : " << initBb[0] << " " << initBb[1] << " " << initBb[2] << " " << initBb[3] << std::endl;
  
      } catch (TCLAP::ArgException &e) {  // catch any exceptions
          std::cerr << "error: " << e.error() << " for arg " << e.argId() << std::endl; 
      }
  
      return 1;
  }
  

輸出結果

[email protected]:build$ sudo ./main
My name is: Tom
Camera ID is: 123
The flag of showing video: 0
data is: 2.3456
initBb : -1 -1 -1 -1

[email protected]:build$ sudo ./main -h

USAGE: 

   ./main  [-b <x,y,w,h>] [-d <double>] [--no-show] [-c <integer>] [-n
           <std::string>] [--] [--version] [-h]


Where: 

   -b <x,y,w,h>,  --boundingbox <x,y,w,h>
     Init Bounding Box

   -d <double>,  --data <double>
     data user defined

   --no-show
     Don't show video

   -c <integer>,  --cam <integer>
     Camera device id

   -n <std::string>,  --name <std::string>
     Name to print

   --,  --ignore_rest
     Ignores the rest of the labeled arguments following this flag.

   --version
     Displays version information and exits.

   -h,  --help
     Displays usage information and exits.


   Command description message

hwj@ubuntu:build$ sudo ./main --version

./main  version: 0.1

[email protected]:build$ sudo ./main -d 0.2457 --no-show -c 2 -n Mike -b 2,3,4,-12
My name is: Mike
Camera ID is: 2
The flag of showing video: 1
data is: 0.2457
initBb : 2 3 4 -12

[email protected]:build$ sudo ./main --data -0.2457 --no-show --cam 22 -n Mike
My name is: Mike
Camera ID is: 22
The flag of showing video: 1
data is: -0.2457
initBb : -1 -1 -1 -1