Is there ever a need for a “do {…} while ( )” loop?

Question

Bjarne Stroustrup (C++ creator) once said that he avoids \"do/while\" loops, and prefers to write the code in terms of a \"while\" loop instead. [See quote below.]

S

Answer 1

In response to a question/comment from unknown (google) to the answer of Dan Olson:

"do { ... } while (0) is an important construct for making macros behave well."

#define M do { doOneThing(); doAnother(); } while (0)
...
if (query) M;
...

Do you see what happens without the do { ... } while(0)? It will always execute doAnother().