Using the word main as an identifier

Can we use main as an identifier?

If yes what ma开发者_高级运维y be the scenarios?

Why not, provided you don't use it in the way main() is used, that is, as a function.

/* Error -- > */ int main() { return 1; } // Redefinition of main()

struct main{}; // ok

int main = 0 ; // error

int main(void) 
{       
    int main=0; // But has to be local.
    goto main;
    printf("Hello");
    main:
    printf("World");
} 

Remember main is NOT a Keyword. But i guess we have not ran out of words, so why use it?

Technically? As a static or auto variable name inside any function, or as a static file-scope variable in any file other than the one containing main(). It might also work as a struct or union tag, or as a typedef anywhere but the file containing main().

Practically? It's a good way to confuse yourself when you come back to the program a year later and wonder what idiot thought that was a good idea. :)

Ok folks, here's the $64,000 question: why would you want to do this? Planning to enter the obfuscated C contest, perhaps? Some unique approach to writing a quine? A test case for a lint-like program? It's certainly not something you'd want to do in a real program.