Shell Programming and Scripting

How does the expenditure of the following commands see out (in a sh-compatible Shell as bash or ksh)?

a) A=2; echo $A; ( echo $A; A=5; echo $A ); echo $A
b) B=2; echo $B; sh -c 'echo $B; B=5; echo $B'; echo $B
c) C=2; export C; echo $C; sh -c 'echo $C; C=5; echo $C'; echo $C

Explain in each case, why the expenditures indicated by you come!

Hey,

this is the last task of my homework. I really do not know how to answer the question.
I would be very happy if you can help me.

thank you very very much.

ciao

tim

Please follow the forum rules and do not post homework.

Homework is there to stretch you. There are many sources you can search and it really is the search that will make you remember. Good luck.

Keith

sorry for adding a post to a closed thread, but I felt I had to post.

One of the reasons I beleive homework should be done by you is that it forces you to think or "stretch" your brain as above.

Ponder the problem and let it rattle around in your head. Plus with the web you can probably find similar examples you can discover and figure out.

Then come back here after you have considered the answer. Present an educated answer you came up with and ask for feedback regarding your answer, not the question. And you might get some good feedback.