How to comment a few lines, with comments inside

Question

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?

Answer 1

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.

Answer 2

int main(){ 

/*
    char c;
    int i; // counter
    double d;
*/
    return 0;
}

Answer 3

If your compiler supports the // notation for comments (non-standard in C, but quite commonly supported), use an editor that can toggle a whole block of lines with these.

Answer 4

In C99

int main(){ 

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

    return 0;
}