代码如下：
代码： 全选
#!/bin/sh
# speed.sh: a very tiny utility to measure typing speed.
prompt="Start typing a piece of text. Press Ctrl-d twice to finish."
echo "\n$prompt \n"
start_time=`date +%s`
words=`cat|wc -w`
end_time=`date +%s`
speed=`echo "scale=2; $words / (($end_time - $start_time) / 60)" | bc`
echo "\n\nYou have a typing speed of $speed words per minute."
