the instance needs recovery and all controlfiles are damaged

Scenario:
1.your database needs recovery(i.e. instance crash, power off, media problem)
2.all of the controlfiles are damaged
3.you have a available backup, all the archivelogs.

Solution:
1.restore all the files needs restoration
2.recover database using backup controlfile until cancel
3.print "auto" when prompted
4.recover database using backup controlfile until cancel

Go to step 5 and step 6 if online redo logs are damaged, go to step 7 and step 8 if not

5.print "cancel"
6.alter database open resetlogs

7.print the name of one online log(you may have to try several times to find which one is correct)
8.alter database open