C + + Primer reading notes (i) First: C + + Overview, chapter I: Getting Started

1. Main content

This paper introduces the core idea of programming language and the basic concept of C + +.

The impression is more profound is divide and conquer (divide and Conque) decomposition thought.

2. Knowledge Square

1) C + + file suffix

• CC, CPP,,CXX

2) compiler function

• One, check for errors (syntax errors, type errors);
• Two, code generation (generate target code or assembly instructions)

3) Implicit conversion of built-in types

• int Intercept

4) #include指示符读入指定文件的内容.

• <> represents a project or standard header file. Find from the environment variable path.
• "" indicates that the user supplied the header file. Finds from the current directory.
• Nested header files are introduced, prompting #ifndef to appear to avoid the introduction of a header file repeatedly.
• C C + + name of the library header file: Cassert "requires the use of namespace Std to introduce C + + name definition", c name assert.h.

5) Define preprocessor constants

-D Name

__cplusplus:c++ file, __stdc__:c file

__time__: Time, __date__: date;

__FILE__: Compile file, __line__: number of compiled lines. "Can Change"

6) input/output stream

Standard Iostream:cin,cout,cerr are pre-defined iostream objects. Endl is a iostream operator that represents an operation that refreshes the output buffer in addition to the data that provides a newline character.

The file Fstream:ifstream,ofstream object.

C + + Primer reading notes (i) First: C + + Overview, chapter I: Getting Started