A Bash question(zz)

redicaps

A command line:

   A=1 echo "this is " $A

the result

   this is

Why?

following are from the bash info:
"
If no command name results, the variable assignments affect the
current shell environment.  Otherwise, the variables are added to the
environment of the executed command and do not affect the current shell
environment.  "

The A=1 should affect the enviroment of "echo $A", right? But why it doesn't.

寂寞烈火

A=1 ; echo "this is " $A

waker

形象的說(shuō)A=1是給 echo 用的不是給bash用的

從規(guī)則上說(shuō) 擴(kuò)展發(fā)生在賦值之前

redicaps

原帖由 waker 于 2008-3-22 11:59 發(fā)表
形象的說(shuō)A=1是給 echo 用的不是給bash用的

從規(guī)則上說(shuō) 擴(kuò)展發(fā)生在賦值之前

Thanks a lot