Any good list of exercises ?

[LordShiva]

I'm a Cpp programmer for years but now I just wanted to search is there anywhere around on internet a good list of exercises that could be useful in refreshing my knowledge.
I have doing python programming and php much more few years and I just wonder is there any good recapitulation exercises list on the internet ? I thus have books about cpp programming with good exercises but I just ask is there a any good online resource for the same ?
Thx

[Mannah]

can you help me with string tokenization???
pllzzzzz

[hulibarri]

projecteuler.net
has a ton.