In this example, the program uses the Boost program_options library to parse command-line options. It defines two options, "input-file" and "output-file", and uses a positional_options_description to specify the order of these options on the command line. The program then prints out the values of these options if they are present in the command line. Finally, it uses getLastArg() to print out the last argument that was parsed. Package/library: Boost program_options --- Example 2:c++ #include