I've an expression of the form shown below :-
while (count)
{
...
...
index = ((count == 20)? 0 : index++);
...
...
}
Now Ternary operators are sequence points in C but I believe that the sequence point ends at the test part.
Is this understanding correct and as such will this statement lead to undefined behaviour ?
Right. There's a sequence point after the evaluation of the condition, but the next sequence point is the semicolon terminating the statement. So whenever count != 20
, you have the undefined behaviour
index = index++;
since index
is modified twice without intervening sequence point.
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