在首地址为DATA的字数组中，存放了100H个16位补码数，试编写一个程序，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。-The number of words in the first address as DATA group, storage 100H 16 complement number, try to write a program, average them on the AX register　and find the array smaller than this average number of the results on the BX register.