1 计算A*B+C-D，把结果输出到屏幕。

2把寄存器al中值，以二进制的形式输出到屏幕，并统计数码1的个数，输出到屏幕。

例如 al=0A6H

屏幕显示格式如下：

10100110B 4

-1 calculate A* B+ CD, the output to the screen. Two in the al register value to form a binary output to the screen, and a number of statistical digital output to the screen. For example, al = 0A6H screen display format is as follows: 10100110B 4