vim: replace a string with the "/" character in it -

i've been using following replace characters:

to find each occurrence of eth0 in current line only, , replace br0,enter (first press esc key , type):
```
:s/eth0/br0/g 
```
to find , replace occurrences of eth1 br1, enter:
```
:%s/eth1/br1/g 
```
to find , replace occurrences of eth1 br1, ask confirmation first, enter:
```
:%s/eth1/br1/gc 
```
to find , replace occurrences of case insensitive eth1 br1, enter:
```
:%s/eth1/br1/gi 
```

however, how replace string 1 has / in it. example, want replace debug printf statements //. when type..

:%s/printf/ // /gc

it gives me trailing characters error. if teach me how thankful.

thank you!

you can use different separator:

:s+sprintf+ // +g

GHI