Today I want to introduce you to a very famous site (most likely you will know it), 
udemy.com , a place that you could learn different thing from videos (have to hand it to them their quality is really good too). The biggest problem with their videos is that they cost a fortune but anyways if you think that the books that I introuduced didn't help here is a link to udemy to learn pascal here. Enjoy!

If you think you are an average programmer and you just want to know how pascal works I have a website that gives a summary of the language here. please don't even visit this website if your an amateur programmer cause it can make you confused because of its rapid teaching.
pros: fast and efficient teaching , low amount of time needed to learn , free
cons : can be a bit confusing . doesn't cover many aspects

http://www.pascal-programming.info/

I want to introduce you to one of the best sources of learning pascal. a free pdf  here. this book start's teaching you from the very beginning talking about different types of compilers and program structures to a medium level of programming. after reading and understanding this book you could start learning c++ with ease. 
pros: its free! , its simple and not a large pdf that takes days to read.
cons: don't know!