Simple Parse Command Line Arguments in C++

getcmdoption.cpp

std::string getCmdOption(int argc, char* argv[], const std::string& option)
{
    std::string cmd;
     for( int i = 0; i < argc; ++i)
     {
          std::string arg = argv[i];
          if(0 == arg.find(option))
          {
               std::size_t found = arg.find_first_of(option);
               cmd =arg.substr(found + 1);
               return cmd;
          }
     }
     return cmd;
}

// simple.exe -ip="127.0.0.1" -port=1000
std::string ip = getCmdOption(argc, argv, "-ip=");
std::string port = getCmdOption(argc, argv, "-port=");

thanks - I like it.

and for the sake of understanding I think this would improve the example (line 19):
... getCmdOption(argc, argv, "-port=");

Breaks when following parameter is passed.

// simple.exe -host=www.google.com -port=1000

Issue with "find_last_of". It matches any character of source. Here, character 'o' from "-host" is matched with 'o' from ".com".

So "m" is returned.

Updated code: Replace line number 9 with std::size_t found = arg.find_first_of("=");

thanks - I like it.

and for the sake of understanding I think this would improve the example (line 19):
... getCmdOption(argc, argv, "-port=");

thanks ;)

Breaks when following parameter is passed.

// simple.exe -host=www.google.com -port=1000

Issue with "find_last_of". It matches any character of source. Here, character 'o' from "-host" is matched with 'o' from ".com".

So "m" is returned.

Updated code: Replace line number 9 with std::size_t found = arg.find_first_of("=");

thanks ;)