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變數

定義變數
	shell
	var=

	perl
	$var =

	C
	int var =
	char var =

	Makefile
	var =
	var :=
使用變數
	shell
	$var
	${var}

	awk
	var

	perl
	$var

	C
	var

	Makefile
	${var} or $(var)
要注意的是



Cyril Huang 2002-06-14