Does anyone know of any good resources out there (books, websites, etc.) for someone to learn C? I can hold my own in assembly but C is totally greek to me, especially since, as I understand it, there are different versions (ANSI C, C for IBM PCs, C for 8051/8052, etc.) that are different. I would like to learn the version to write code for the 8051 Family of microcontrollers.

Thanks for any help!