Putting a composite statement in the condition of a for loop

Question

I have a contrived example to demonstrate the request for a specific functionality - I wonder if anyone has a clever trick to do this.

The following is a problem one

Answer 1

For both readability and performance, I think the following code can be used:

for (ii = 0;; ii++)
{
    printf("%d", ii);
    (ii < 3) ? (putchar(' ')) : ({ putchar('\n'); break; });
}

Actually, the above code is similar to your last code. It is readable, and it still has one conditional evaluation in each increment.