C ++ static things

[Cpp]
# Include <QtCore/QCoreApplication>
# Include <iostream>
# Include <stdio. h>
Using namespace std;
 
Class
{
Public:
A ();
Static void GetStaticNum (); // static function
 
Void GetNum (); // Common Function
 
Void UseStatic (); // call a static function
 
Int j; // common variable Member
Static int I; // static member variable
};
 
Int A: I = 0; // static member variable Initialization
 
A: ()
{
J = 2;
}
 
Void A: GetStaticNum ()
{
I ++;
Cout <"wyz ======== GetStaticNum () I =" <I <endl;
}
 
Void A: GetNum ()
{
J ++;
Cout <"wyz ======= GetNum () I =" <I <endl;
Cout <"wyz ======== GetNum () j =" <j <endl;
}
 
Void A: UseStatic ()
{
Static int k = 0; // static variable
K ++;
 
Cout <"wyz ========= UseStatic () k =" <k <endl;
GetStaticNum ();
}
 
 
Int main (int argc, char * argv [])
{
QCoreApplication a (argc, argv );
 
A aa1;
Aa1.GetNum ();
 
A aa2;
Aa2.GetNum ();
 
A aaa1;
Aaa1.GetStaticNum (); // method 1 of static function call
 
A: GetStaticNum (); // method 2 of static function call
 
A * aa = new ();
Aa-> GetNum ();
Aa-> UseStatic ();
Aa-> UseStatic ();
 
Delete aa;
 
Return 0;
 
Return a.exe c ();
}

# Include <QtCore/QCoreApplication>
# Include <iostream>
# Include <stdio. h>
Using namespace std;

Class
{
Public:
A ();
Static void GetStaticNum (); // static function

Void GetNum (); // Common Function

Void UseStatic (); // call a static function

Int j; // common variable Member
Static int I; // static member variable
};

Int A: I = 0; // static member variable Initialization

A: ()
{
J = 2;
}

Void A: GetStaticNum ()
{
I ++;
Cout <"wyz ======== GetStaticNum () I =" <I <endl;
}

Void A: GetNum ()
{
J ++;
Cout <"wyz ======= GetNum () I =" <I <endl;
Cout <"wyz ======== GetNum () j =" <j <endl;
}

Void A: UseStatic ()
{
Static int k = 0; // static variable
K ++;

Cout <"wyz ========= UseStatic () k =" <k <endl;
GetStaticNum ();
}

Int main (int argc, char * argv [])
{
QCoreApplication a (argc, argv );

A aa1;
Aa1.GetNum ();

A aa2;
Aa2.GetNum ();

A aaa1;
Aaa1.GetStaticNum (); // method 1 of static function call

A: GetStaticNum (); // method 2 of static function call

A * aa = new ();
Aa-> GetNum ();
Aa-> UseStatic ();
Aa-> UseStatic ();

Delete aa;

Return 0;

Return a.exe c ();
}

Result:

[Cpp]
Starting/root/qtdir/StaticFunc-build-desktop/StaticFunc...
Wyz ========= GetNum () I = 0
Wyz ========= GetNum () j = 3
Wyz ========= GetNum () I = 0
Wyz ========= GetNum () j = 3
Wyz ========= GetStaticNum () I = 1
Wyz ========= GetStaticNum () I = 2
Wyz ========= GetNum () I = 2
Wyz ========= GetNum () j = 3
Wyz ========= UseStatic () k = 1
Wyz ========= GetStaticNum () I = 3
Wyz ========= UseStatic () k = 2
Wyz ========= GetStaticNum () I = 4
/Root/qtdir/StaticFunc-build-desktop/StaticFunc exited with code 0

Starting/root/qtdir/StaticFunc-build-desktop/StaticFunc...
Wyz ========= GetNum () I = 0
Wyz ========= GetNum () j = 3
Wyz ========= GetNum () I = 0
Wyz ========= GetNum () j = 3
Wyz ========= GetStaticNum () I = 1
Wyz ========= GetStaticNum () I = 2
Wyz ========= GetNum () I = 2
Wyz ========= GetNum () j = 3
Wyz ========= UseStatic () k = 1
Wyz ========= GetStaticNum () I = 3
Wyz ========= UseStatic () k = 2
Wyz ========= GetStaticNum () I = 4
/Root/qtdir/StaticFunc-build-desktop/StaticFunc exited with code 0
Author: wyz365889