用DS1302做个时钟,答:if(k6==0) { delay(20); if(k6==0) { while(k6==0); V++; V=V%2; } } switch(V) { case 0:shi0=button_time(shi0,24,23); write1302 (0x8e,0X00); write1302 (0xc2,DEC2BCD(shi0) ); write1302 (0x8e,0x80); xian(n0[1],n0[0],0x00,10,10,0x00,10,10); break; ...