[C ++ Basics] 001 _ differences

C ++ is developed on the basis of C and is compatible with C. But it is only compatible. It has its own complete set of language rules. Of course, you have its own characteristics, one of which is <iostream>.

C ++ introduces namespace, which avoids repeated conflicts between variables and function names. This is a good mechanism, and <iostream> conforms to this set of implementations.Code.

<Iostream. h> follows the C-style header file. After filling in this file, you can directly use functions such as cout and CIN.

Summary:

■ <Iostream> for C ++, if you want to use cout, you need to add using namespace STD or use STD: cout

■ <Iostream. h> C style. You can directly use cout for introduction.