README ¶ 实现这样一个场景:我们需要开发一个基于命令行的计算器程序。下面为此程序的基本用法: $ calc help USAGE: calc command [arguments] ... The commands are: sqrt Square root of a non-negative value. add Addition of two values. $ calc sqrt 4 # 开根号 2 $ calc add 1 2 # 加法 3 Expand ▾ Collapse ▴ Documentation ¶ There is no documentation for this package. Source Files ¶ View all Source files calc.go Directories ¶ Show internal Expand all Path Synopsis simplemath Click to show internal directories. Click to hide internal directories.