能帮我详细解释下该程序,我是初学者,#include#define uchar unsigned charuchar tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //0到fuchar keyval;uint x;void delay(uchar a){uchar i,j;for(i=0;i
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