optget.cpp

#include <iostream>
#include <unistd.h> // getopt


int main(int argc, char* argv[]) {
   int a = 0;
   int b = 0;
   bool c = false;

   // first argument parsing
   int opt;
   for(int i = 0; i < argc; i++) std::cout << argv[i] << std::endl;
   while((opt=getopt(argc,argv,"a:c"))!=-1) {
      switch(opt) {
         case 'a':
            a = atoi(optarg);
            break;
         case 'c':
            c = true;
            break;
      }
   }

   // second argment parsng
   for(int i = 0; i < argc; i++) std::cout << argv[i] << std::endl;
   optind = 1;
   while((opt=getopt(argc,argv,"a:b:c"))!=-1) {
      switch(opt) {
         case 'a':
            a = atoi(optarg);
            break;
         case 'b':
            b = atoi(optarg);
            break;
         case 'c':
            c = true;
            break;
      }
   }

   std::cout << "a = " << a << std::endl;
   std::cout << "b = " << b << std::endl;
   std::cout << "c = " << c << std::endl;

   return 0;
}