在Linux使用gcc编译程序的时候，对于调试的语句还具有一些特殊的语法。gcc编译的过程中，会生成一些宏，...
A required string positional argument named question. An answer number option specified with -a or --answer that should default to 42 if not given. A help command-line flag given by -h or --help. You may use the shargs-opts module to get a nice DSL for describing our options. However...