为什么这个程序的结果不对?小弟我想在s6、s7、s8、s9、s10中分别存放60-69，70-79，80-89，90-99,100这些范围的数的个数

为什么这个程序的结果不对?我想在s6、s7、s8、s9、s10中分别存放60-69，70-79，80-89，90-99,100这些范围的数的个数

Assembly code

datarea segment
  arry    dw  76,69,84,90,73,88,99,63,100,80
  S6    dw  ?
  S7    dw  ?
  S8      dw  ?
  S9     dw  ?
  S10    dw  ?
datarea    ends

prognam segment
main     proc    far
    assume cs:prognam,ds:datarea
start:
    push    ds
    sub    ax,ax
    push    ax
 
    mov    ax,datarea
    mov    ds,ax

    mov    S6,0
    mov    S7,0
    mov    S8,0
    mov    S9,0
    mov    S10,0

    call    switch
    ret
main endp

switch    proc    near    
    mov    cx,10
    mov    si,0
first:
    mov    ax,arry[si]
    add    si,2
    cmp    ax,70
    jnb    next1
    inc    S6
    loop    first
next1:
    cmp    ax,80
    jnb    next2
    inc    S7
    loop    first
next2:    
    cmp    ax,90
    jnb    next3
    inc    S8
    loop    first
next3:
    cmp    ax,100
    jnb    next4
    inc    S9
    loop    first
next4:
    inc    S10
    loop    first
    ret
switch    endp
prognam ends    
    end start

------解决方案--------------------
datarea segment
arry dw 76,69,84,90,73,88,99,63,100,80
S6 dw ?
S7 dw ?
S8 dw ?
S9 dw ?
S10 dw ?
datarea ends

prognam segment
main proc far
assume cs:prognam,ds:datarea
start:
push ds
sub ax,ax
push ax
 
mov ax,datarea
mov ds,ax

mov S6,0
mov S7,0
mov S8,0
mov S9,0
mov S10,0

call switch
ret
main endp

switch proc near
mov cx,10
mov si,0
first:
mov ax,arry[si]
add si,2
cmp ax,70
jnb next1
inc S6
loop first
jmp exit
next1:
cmp ax,80
jnb next2
inc S7
loop first
jmp exit
next2:
cmp ax,90
jnb next3
inc S8
loop first
jmp exit
next3:
cmp ax,100
jnb next4
inc S9
loop first
jmp exit
next4:
inc S10
loop first
exit:
ret
switch endp

prognam ends

end start