9.15.3.2 Special Characters

The presence of a ‘ # ’ appearing anywhere on a line indicates the start of a comment that extends to the end of that line.

If a ‘ # ’ appears as the first character of a line then the whole line is treated as a comment, but in this case the line can also be a logical line number directive (see Comments ) or a preprocessor control command (see Preprocessing ).

If the --divide command line option has not been specified then the ‘ / ’ character appearing anywhere on a line also introduces a line comment.

The ‘ ; ’ character can be used to separate statements on the same line.