C + + small point of knowledge

Source: Internet
Author: User

1. C + + copy constructor parameter is const type

Cause: Because the copy constructor is passed the copied object by reference, the reference is passed the address, so the modification of the reference within the constructor affects the source object and prevents the source object from being modified by setting the parameter type to const

2. Enumeration type

When using enumerations, you will encounter this warning: warning C4482:nonstandard extension used:enum

Reason: nonstandard extension used: Enumeration "enum" is used in qualified names when enumerating within a reference type, you do not need to specify the name of the enumeration. File-scoped enumeration definitions are equivalent to constants and do not require qualified names.

C + + small point of knowledge

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.