ex22a.sh

来自「一本完整的描述Unix Shell 编程的工具书的所有范例」· Shell 代码 · 共 22 行

#!/bin/bash
# Planets revisited.

# Associate the name of each planet with its distance from the sun.

for planet in "Mercury 36" "Venus 67" "Earth 93"  "Mars 142" "Jupiter 483"
do
  set -- $planet  # Parses variable "planet" and sets positional parameters.
  # the "--" prevents nasty surprises if $planet is null or begins with a dash.

  # May need to save original positional parameters, since they get overwritten.
  # One way of doing this is to use an array,
  #        original_params=("$@")

  echo "$1		$2,000,000 miles from the sun"
  #-------two  tabs---concatenate zeroes onto parameter $2
done

# (Thanks, S.C., for additional clarification.)

exit 0