Why http is allowed in c++ compiler

Question

Below code works without any error :
#include <iostream>
using namespace std;

int main()
{
http://stackoverflow.com

return 0;
}

I was expecting compiler error. any idea on this ?

Answer 1

As said here-
https://www.geeksforgeeks.org/writing-url-c-program/

http: becomes a goto because of ':' and //is just comment

Answer 2

Akib Reza http becomes a "label" (goto is a statement that jumps to labels).
That reference fumbles the explanation a bit.

Answer 3

Kirk Schafer I don't know any other explanation. 👀