题目8：求s=a+aa+aaa+aaaa+aa...a的值，其中a是一个数字。例如 2+22+222+2222+22222(此时共有5个数相加)，几个数相加有键盘控制。 -Title 8: o s = a+ aa+ aaa+ aaaa+ aa... A value, of which a is a number. For example 2+ and+ 222+ 2222+ 22222 (the five number additive), a few numb

基于单片机的脉冲宽度测量设计，结题报告，可以直接使用-Pulse width measurement based on single chip design, concluding report can be used directly