Ok, I have narrowed the book I want as a C++ reference to these two.
Judging from the review, I'd like to go with C++ Primer Plus: 5th Edition instead of the C++ Primer: 4th Edition. What do you guys think?

C++ Primer Plus: 5th Edition
C++ Primer: 4th Edition

Another reason for choosing the C++ Primer Plus: 5th Edition was because it has answers to the questions and examples in each chapter, at the back of the book.

For C++ Primer: 4th Edition, you have to buy the C++ Answer Key book...and from the reviews, it has said that the answer key uses the examples from the 3rd Edition.

Any opinions are fine.