do_square

UNIX[1].shell范例精解(第4版)_code

# Scriptname: do_square
#!/bin/ksh
function square {
 (( sq = $1 * $1 ))
	print "Number to be squared is $1."
	print "The result is $sq "
}

read number?"Give me a number to square. "
value_returned=$(square $number)
print $value_returned