The difference between C + + const and # define

Source: Internet
Author: User

C + + can use the const to define constants, or define constants using define #, which has more advantages than the latter.

1) const data constants have data types, and macro constants do not have data types. The compiler can perform type safety checks on the former and only string substitution for the latter

2) Some integrated debugging tools can debug const constants, but cannot debug macro constants, only const constants are used in C + + and macro constants are not used

When the const in C is decorated with a normal variable, in c it always takes up memory, and its name is the global symbol.

C Forcing programmers to use # define in the preprocessor

The difference between C + + const and # define

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.