c++000001

The statement "#" is called a macro definition or precompiled directive

Single-line comment/**/Multiline comment

function return value: Void means that no data is returned, and return statements are required if the data is returned

-------------Data Type-------------

The data type determines how much memory is used to store the data.

4294967295 is the maximum number of positive integers allowed for 32-bit CPU registers

Octal starts with 0, each value range is 0-7, the hexadecimal prefix is 0X or 0x, the digital value range is 0~9, and a~f or a~f.

Character constants are single-quoted characters, string constants are 0 or more characters enclosed in double quotation marks, and the string constant "a" is made up of ' a ' and ' two ' characters.

BOOL constant: TRUE, false.

Identifier: identifier. Case sensitive

Variable declaration: [Signed] short [int]

CIN reads the data as a variable with a space or carriage return as its end flag.

c++000001