An old man was sitting in a park reading the book "Learn C in 21 days".

A passer by saw him and asked "You are such an old guy, why do you bother to learn C?"

"I have heard that now communication language at heaven is only C, so after my death when I will be in heaven, I don't want to face communication problem." old man replied.

"But how come are you so sure that U will be in heaven? It could be hell also." he asked.

"Ya, doesn't matter .... I already know Java".