Class const, static, static const member variables in C + +

Source: Internet
Author: User

#include <iostream>
using namespace Std;


Class Test
{
Private
const int A; Const member variables can only be initialized in the constructor's member initialization list, not in the body of the function, or elsewhere
static int b; Static member variables need to be initialized at global scope, format: Type name Class Name:: Variable name = value
The static const int C;//static Const member variable needs to be initialized globally in the format: type name Class Name:: Variable name = value
Public
Test (): A (1) {}//correct
Test () {a = 1;}//Error
int Get_a ()
{
return A;
}
int Get_b ()
{
return b;
}
int Get_c ()
{
return C;
}
};
int test::b = 2;
const int TEST::C = 3;
int main ()
{
int test::b = 2; Error
const int TEST::C = 3; Error
Test temp;
cout << temp.get_a () << Endl << temp.get_b () << Endl << temp.get_c () << Endl;


Cin.get ();
return 0;
}

Class const, static, static const member variables in C + +

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.