There is no special function or syntax for calling an external command. Taking advantage of the Regina utility rxqueue, which puts output onto the Rexx stack, we can write a "numbered ls" utility as
没有特定的函数或语法用于调用外部命令。
2
Functions, external routines, and the stack.
函数、外部例程和堆栈。
3
Multiple devices can be connected in series through an interface that sends data up and down the battery stack without external level shifters or isolators.