C ++ syntax

The C ++ syntax is too delicate, so many students cannot understand it well. This article provides a few small examples for readers to think about.

1. inline and virtual

# Include <iostream>

Class

{

Public:

Virtual inline void func ()

{

STD: cout <"A: func" <STD: Endl;

}

};

Class B: public

{

Public:

Virtual inline void func ()

{

STD: cout <"B: func" <STD: Endl;

}

};

Int main (INT argc, char * argv [])

{

A (). func ();

B (). func ();

A * P = new B ();

P-> func ();

Delete P;

}

2. Initialization of built-in global variables, static built-in variables, local built-in variables, register built-in variables, and dynamically allocated built-in Variables

# Include <iostream>

Int;

Int & B () {static int result; return result ;}

Int main (INT argc, char * argv [])

{

Int C;

Register int D;

Int & E = * New int;

STD: cout <A <STD: Endl;

STD: cout <B () <STD: Endl;

// STD: cout <C <STD: Endl;

// STD: cout <D <STD: Endl;

STD: cout <e <STD: Endl;

Delete & E;

}