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Why does inserting URLs in C and C++ code work?

Why does the following code compile? Which section of the language allows URLs to be added in C and C++ code?

int main()
{
     http://www.stackoverflow.com
     return 0;
}

Thanks in advance, Castro.

Solution

  • If you compiled with warnings, you would notice:

    warning: label ‘http’ defined but not used

    That should be indicative enough of the problem here.

    The http: text is treated as a label.

    Followed by // negating the remaining text as a comment, ignoring it.

    http://www.stackoverflow.com

    Even the SO syntax colour schemes indicated as above show this to be true, as the section after the http, is treated as a comment (grayed out).