学习板上标示为J8,J13双排插针上插上短路块，连接ISP下载线到学习板，下载C13-2.hex程序到学习板。此时数码管会显示0 000 字样。其中“万”位管为状态键，显示为0，右边3个数码管显示数据。按S1键，数据递增到“999”，按S2键 数据递减到“000”按S4可将数据存入SHUZU[1]中，按S1或S2选择不同的数据 并按S4存入SHUZU[2~9]中，最后按S3最左边的数码管熄灭，右边三个数码管显示从数组SHUZU[]中找出最大的数。-Learning board labeled J8, J13 double pin on the plug short-circuit block, connect ISP download cable to the study board, download the C13-2.hex program to learn board. At this point digital tube will display 0000 words. The " million"　bit pipe for the state of keys, appears as 0, the right three digital display data. By S1 key, the data increase to " 999" , according to S2 key data reduced to the " 000"　data can be stored by S4 SHUZU [1], press the S1 or S2 to select a different data according to S4 into SHUZU [2 ~ 9], the last by S3 digital tube off the far left, the right side of the three digital display from an array SHUZU [] to find the largest number.