C++ 命令行解析库Tclap

偏执的太偏执、 2021-11-02 03:18 498阅读 0赞

[http://tclap.sourceforge.net/][http_tclap.sourceforge.net]

一个官方demo：test1.cpp

#include <string>
    #include <iostream>
    #include <algorithm>
    #include "tclap/CmdLine.h"
    
    using namespace TCLAP;
    using namespace std;
    
    int main(int argc, char** argv)
    {
            // Wrap everything in a try block.  Do this every time, 
            // because exceptions will be thrown for problems. 
            try {
    
            // Define the command line object.
            CmdLine cmd("Command description message", ' ', "0.9");
    
            // Define a value argument and add it to the command line.
            ValueArg<string> nameArg("n","name","Name to print",true,"homer","string");
            cmd.add( nameArg );
    
            // Define a switch and add it to the command line.
            SwitchArg reverseSwitch("r","reverse","Print name backwards", false);
            cmd.add( reverseSwitch );
    
            // Parse the args.
            cmd.parse( argc, argv );
    
            // Get the value parsed by each arg. 
            string name = nameArg.getValue();
            bool reverseName = reverseSwitch.getValue();
    
            // Do what you intend too...
            if ( reverseName )
            {
                    reverse(name.begin(),name.end());
                    cout << "My name (spelled backwards) is: " << name << endl;
            }
            else
                    cout << "My name is: " << name << endl;
    
    
            } catch (ArgException &e)  // catch any exceptions
            { cerr << "error: " << e.error() << " for arg " << e.argId() << endl; }
    }

效果：

[leajon@arch examples]$ ./test1
    PARSE ERROR:  
                 Required argument missing: name
    
    Brief USAGE: 
       ./test1  [-r] -n <string> [--] [--version] [-h]
    
    For complete USAGE and HELP type: 
       ./test1 --help
    
    [leajon@arch examples]$ ./test1 -n tclap -r
    My name (spelled backwards) is: palct

转载于:https://www.cnblogs.com/Leo-Forest/archive/2012/08/07/2627403.html

[http_tclap.sourceforge.net]: http://tclap.sourceforge.net/