Description: Design a stopwatch, the stopwatch with a button k work, when the 1st button is pressed, the stopwatch starts counting, press the button 2 times, the stopwatch stops counting, 3rd button is pressed, the stopwatch counter continues to count , 4 times the button is pressed, the stopwatch counter stops counting, and so forth. If the state stopped counting, pressing the button longer than 2s, the stopwatch counter is cleared
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电子秒表max+plus ii.doc