CommandLineParse类(命令行解析类)

https://blog.csdn.net/jkhere/article/details/8674019

https://sophia0130.github.io/2018/05/08/CommandLineParse%E7%B1%BB/

https://blog.csdn.net/ylf_2278880589/article/details/80811304

Java命令行选项解析之Commons-CLI & Args4J & JCommander

这个类的出现主要是方便用户在命令行使用过程中减少工作量，可以在程序文件中直接指定命令行中的参数指令，方便了调试。

1. C++ 例子:

 

#include "opencv2/video/tracking.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
 
#include <iostream>
#include <ctype.h>
#include <string>
 
using namespace cv;
using namespace std;
 
const char* keys =
{
    "{ c | camera | 0 | use camera or not}"
    "{ fn | filename |xxxx.avi | movie file}"
    "{ t | test | test string | good day!}"
};
 
 
int main(int argc, const char** argv )
{
 
    CommandLineParser parser(argc, argv, keys);
    
    bool useCamera = parser.get<bool>("c");//括号里写成“camera”也可以
    string file = parser.get<string>("fn");
    string third = parser.get<string>("t");
 
    //打印输出
    cout<<useCamera<<endl;
    cout<<file<<endl;
    cout<<third<<endl;
    cout<<endl;
    parser.printParams();//CommandLineParser的成员函数，打印全部参数，还有其他成员函数，如：has(),getString()等
    return 0;
}

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