Single line comments in Ansi

I'm used to // to mark a single line comment from Java and Visual Studio and was surprised that this does not exist for Ansi-C. Using /* my comment */ is quite annoying. Is there any other way to mark a single line comment when using Ansi-C?

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ANSI-C，不，但目前的C99标准允许它们。

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You could also write a macro:

#define COMMENT(x)

int main() {
   COMMENT(Hi there)
   return 0;
}

Other than that nothing obvious in ANSI C - you're correct in noting that /* */ style is not valid in ANSI C 89

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Well ...

ANSI C is C99; and it allows comments starting with // extending to the end of the line.
In the previously published standard (C89/C90) the // comments weren't described (but many compilers accepted them as an extra anyway).

You have yet another option for commenting: the #if 0 / #endif construction (usually used for commenting out "inactive" code)

/* ... */
#if 0
This is a comment
#endif
/* ... */

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