计算按钮开关被按的次数。按钮开关K1作为单片机的输入信号，开关K1被按的次数由P1端口所接的8只LED来显示。8只LED可看作8位二进制数，亮的为0，灭的为1。在观察LED计数时可参照书后附录B，将二进制数转换十进制数阅读-Button switch was calculated according to the number. Button switch K1 as a single-chip input signals, switch K1 to be in accordance with the number received by the P1 port of the 8 LED display. 8 LED can be seen as 8-bit binary number, brightest to 0, out for 1. Observed count LED can draw on the book in Appendix B, will convert a decimal number binary number read