total = total + num; is equivalent to ____.
A. total += num;
B. total =+ num;
C. total ++ num;
D. total +=+ num;
查看答案
____ is an accumulating statement.
A. total += num;
B. total++;
C. ++total;
D. total *= num;
Generally, before accumulating values, the accumulator variable should be initialized to ____.
A. -1
B. 1
In computer programming, data values used to signal either the start or end of a data series are called ____.
A. input values
B. limits
C. sentinels
D. iterators
In Unix operating systems, the EOF mark is generated whenever the ____ keys are pressed simultaneously.
A. Ctrl and D
B. Ctrl and E
Ctrl and F
D. Ctrl and Z