;在buf开始存放10个字节的有符号数,分别统计正数,负数和零的
;个数,存放在数组的后面.
data segment
buf db 0ffh,01h,98h,0a7h,00h,00h,00h,33h,88h,7fh
data ends
code segment
assume  cs:code,ds:data
start:  mov ax,data
        mov ds,ax
        lea si,buf
        mov cx,10
x4:     mov al,[si]
        or al,al
        jz x1    ;为零转移
        jns x2   ;不为负数转移
        inc bl   ;bl是负数的个数
        jmp x3
x1:     inc bh   ;bh是零的个数
        jmp x3
x2:     inc dl   ;dl是正数的个数
x3:     inc si
        loop x4
        mov [si],dl
        mov [si+1],bl
        mov [si+2],bh
        mov ah,4ch
        int 21h
code    ends
        end start