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I run into a code:
printf("\tout:\t%-14.14s\n", (sprintf(tmpbuf[0], "[%s]", mystring), tmpbuf[0]));
What does those sentence in () with sprintf mean?
It is an expression involving the comma operator, to put the following into a single line:
The comma operator evaluates both arguments and returns its right argument, i.e.
tmpbuf[0].