C中的IF-ELSE语句快捷方式

Question

C has the following syntax for a shorthand IF-ELSE statement

    (integer == 5) ? (TRUE) : (FALSE);

I often find myself requiring only one portion (TRUE or FALSE) of the statement and use this

    (integer == 5) ? (TRUE) : (0);

I was just wondering if there was a way to not include the ELSE portion of the statement using this shorthand notation?

Answer 1

The operator ?: must return a value. If you didn't have the "else" part, what would it return when the boolean expression is false? A sensible default in some other languages may be null, but probably not for C. If you just need to do the "if" and you don't need it to return a value, then typing if is a lot easier.

Answer 2

Question is whether we can somehow write the following expression without both then and else parts

 (integer == 5) ? (THENEXPR) : (ELSEEXPR); 

If you only need the then part you can use &&:

 (integer == 5) && (THENEXPR) 

If you only need the else part use ||:

 (integer == 5) || (ELSEEXPR)