题目内容

Analyze the following fragment.double x = 0;double d = 1;switch (d + 4) {case 5: x++;case 6: --x;}

A. The required break keyword is missing in the switch statement.
B. d + 4 should be replaced by 5.
C. The switch control variable cannot be double.
D. The required default keyword is missing in the switch statement.

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