Description: Single-chip LCD calculator stopwatch can complete a modified version of the switch to achieve two functions, and other functions to study the control code. 4* 4 matrix keyboard, the first row is to achieve the first three hours out \ minutes \ seconds plus. The second row is to achieve the first three hours out \ minutes \ seconds by. Of course, by setting the matrix can also be keyboard keys to to achieve increases \ by \ x \ in addition to four computing, digital tube display by the number of operations involved in computing the final results, as well as
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jsq.c
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