Best comment questions in October 2010

How to comment a few lines, with comments inside

Asked on Fri, 15 Oct 2010 by pvinis c++ c comment
21 votes

I have a program like this

int main(){ 

    char c;
    int i; /* counter */
    double d;

    return 0;
}

if I want to comment out char, int and double, and just have return uncommented, can I do it? the comment that's already there stops the comment.. Is there an easy/fast way to comment that out?

Answered by Steve Townsend 

int main(){ 
#if 0
    char c;
    int i; /* counter */
    double d;
#endif
    return 0;
}

Not strictly a comment, but the effect is what you want and it's easy to revert.

This also scales well to larger code blocks, especially if you have an editor that can match the start and end of the #if..#endif.