// Sums up all (long) integer values supplied on the command-line
// Takes unsigned integers in HEX representation. Output is in HEX
// Copyleft: Sathiamoorthy Manoharan.

#include <iostream>
#include <cstdio>

int
main(int argc, char* argv[])
{
   unsigned long sum = 0;
   for ( int i = 1; i < argc; ++i )
   {
      unsigned long a;
      ::sscanf(argv[i], "%lx", &a); // read hex string and form long value
      sum += a; // same as 'sum = sum + a'
   }
   std::cout << "sum: " << std::hex << sum << "\n";

   return 0;
}