在首地址为DATA的字数组中，存放了100H个16位补码数，求出它们的平均值放在AX寄存器中；并求出数组中有多少个数小于此平均值，将结果放在BX寄存器中-Stored word group in the first address of the DATA 100H-16' s complement number, calculate their average value in the AX register　and calculate how many number of smaller than average in the array, the results put in the BX register