输入几个数字请和最大最小值平均数

a:输入3,2,1show或者99,100,32,0,8show显示输出；

b:输入exit退出。

DATAS SEGMENT
    len = 128
    count = 10
    k_exit db 'exit'
    k_show db 'show'
    arrNum db count dup(0)
    tmpBuf db 8 dup('0')
    outBuf db 8 dup('0')
    maxMsg db 'Max number is: $'
    minMsg db 'Min number is: $'
    sumMsg db 'Total is: $'
    avrMsg db 'Average is: $'
    errMsg1 db 'Input number must < 256',13,10,'$'
    errMsg2 db 'Overflow while summary all number',13,10,'$'
    msg1 db 'Please input: $'
    msg2 db 'Your input message: $'
    buf db len
        db ?
        db len dup('0')
        db '$'
DATAS ENDS

STACKS SEGMENT
    db 10 dup(0)
STACKS ENDS  

CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS,SS:STACKS  
    
CLEARBUF PROC
    push bx
    mov cx,10
    lea bx,arrNum
@@:
    mov [bx],0
    inc bx
    loop @b    
    pop bx
    ret
CLEARBUF ENDP    
  
SHOWSTR PROC
    mov ah,9
    int 21h 
    ret
SHOWSTR ENDP  

SHOWMAX PROC
    lea dx,maxMsg
    call SHOWSTR
    ret 
SHOWMAX ENDP

SHOWMIN PROC
    lea dx,minMsg
    call SHOWSTR
    ret 
SHOWMIN ENDP
    
SHOWSUM PROC
    lea dx,sumMsg
    call SHOWSTR
    ret 
SHOWSUM ENDP    
    
SHOWAVER PROC
    lea dx,avrMsg
    call SHOWSTR
    ret 
SHOWAVER ENDP     
    
NEWLINE PROC
    push dx
    push ax
    mov dl,13
    mov ah,2
    int 21h
    mov dl,10
    mov ah,2
    int 21h
    pop ax
    pop dx
    ret
NEWLINE ENDP
  
ISEXIT PROC
    xor dx,dx
    mov dl,buf+1
    sub dl,4
    mov si,offset buf+2
    add si,dx
    lea di,k_exit
    mov cx,4
    xor ax,ax
    cld  
@@:
    cmpsb
    jne isexit2
    inc ax
    loop @b
isexit2:
    ret
ISEXIT ENDP  
    
ISSHOW PROC
    xor dx,dx
    mov dl,buf+1
    sub dl,4
    mov si,offset buf+2
    add si,dx
    lea di,k_show
    mov cx,4
    xor ax,ax
    cld  
@@:
    cmpsb
    jne isshow2
    inc ax
    loop @b
isshow2:     
    ret
ISSHOW ENDP   

INTTOSTR PROC ;16bit
    push si
    push di
    push bx
    mov dl,10
    lea bx,tmpBuf
    xor si,si
@@:        
    test ax,ax
    jz @@0
    div dl
    add ah,30H
    mov [bx],ah
    and ax,0FH
    inc bx
    inc si
    jmp @b
@@0:    
    mov [bx],'$'
    mov bx,si    
    mov cx,bx
    dec bx
    lea si,tmpBuf
    lea di,outBuf
@@:        
    mov al,[bx+si]
    mov [di],al
    inc di
    dec bx
    loop @b    
    mov [di],'$'
     pop bx
    pop di
    pop si
    ret
INTTOSTR ENDP    

INTTOSTREX PROC ;32bit
    push si
    push di
    push bx
    mov di,10
    lea bx,tmpBuf
    xor si,si
    xor dx,dx
@@:        
    test ax,ax
    jz @@1
    div di
    add dl,30H
    mov [bx],dl
    xor dx,dx
    inc bx
    inc si
    jmp @b
@@1:    
    mov [bx],'$'
    mov bx,si    
    mov cx,bx
    dec bx
    lea si,tmpBuf
    lea di,outBuf
@@:        
    mov al,[bx+si]
    mov [di],al
    inc di
    dec bx
    loop @b    
    mov [di],'$'
     pop bx
    pop di
    pop si
    ret
INTTOSTREX ENDP 

INTTOSTREX2 proc uses ax bx cx dx 
  test ax,ax
  jz d4
  mov bx,10 
  xor dx,dx 
  xor cx,cx
  cld
d2: 
  test ax,ax 
  jz d3 
  div bx 
  add dl,30h 
  push dx 
  xor dx,dx 
  inc cx 
  jmp d2 
d3:  
  pop ax 
  stosb
  loop d3
  mov [di],'$'
  ret 
d4:
  mov [di],'0'
  mov [di+1],'$'
  ret  
INTTOSTREX2 endp
    
GETMAXNUM PROC
    push bx
    push dx
    xor ax,ax
    lea bx,arrNum
    mov al,[bx]
    inc bx
max0:
    mov dl,[bx]
    cmp dl,al
    ja max1
    jmp max2
max1:
    mov al,dl
max2:    
    inc bx
    cmp [bx],'$'
    jnz max0    
    call INTTOSTREX
    pop dx
    pop bx
    ret
GETMAXNUM ENDP  

GETMINNUM PROC
    push bx
    push dx
    xor ax,ax
    lea bx,arrNum    
    mov al,[bx]
    test al,al
    jz min3
    inc bx
min0:
    mov dl,[bx]    
    cmp dl,al
    jb min1
    jmp min2
min1:
    mov al,dl
    test al,al
    jz min3    
min2:    
    inc bx
    cmp [bx],'$'
    jnz min0
    call INTTOSTREX
    pop dx
    pop bx    
    ret
min3:
    lea bx,outBuf
    mov [bx],'0'
    inc bx
    mov [bx],'$'    
    pop dx
    pop bx
    ret
GETMINNUM ENDP    
    
GETAVERAGE PROC
    push bx
    push dx
    xor ax,ax
    xor cx,cx
    xor dx,dx
    lea bx,arrNum
AVER0:
    mov dl,[bx]    
    cmp [bx],'$'
    jz AVEREXIT
    add ax,dx
    inc cx
    inc bx
    jmp AVER0
AVEREXIT:
    xor dx,dx
    div cx    
    pop dx
    pop bx
    ret
GETAVERAGE ENDP      
    
START:
    MOV AX,DATAS
    MOV DS,AX
    MOV ES,AX
NEXT:   
    call CLEARBUF 
    lea dx,msg1
    mov ah,9
    int 21h
    call NEWLINE
    lea dx,buf
    mov ah,10
    int 21h
    call NEWLINE
    lea dx,msg2
    mov ah,9
    int 21h    
    call NEWLINE
    xor dx,dx
    mov dl,buf+1
    mov al,'$'
    mov bx,offset buf
    add bx,dx    
    add bx,2
    mov [bx],al
    mov dx,offset buf+2
    mov ah,9
    int 21h
    call NEWLINE
    ;
    call ISSHOW
    cmp al,4
    je main0
    jmp chkexit
main0:
    xor dx,dx
    mov dl,buf+1
    mov al,'$'
    mov bx,offset buf
    add bx,dx    
    add bx,2
    sub bx,4
    mov [bx],al
    ;
    mov bx,offset buf + 2
    mov dx,bx
    mov ah,9 
    int 21h
    call newline   
    mov di,offset arrNum
    xor dx,dx
    xor ax,ax
    mov cl,10
main1:     
    mov dl,[bx]
    cmp dl,'$'
    je main5    
    cmp dl,','
    jne main2
    jmp main3
main2:
    mul cl
    sub dl,30H
    add al,dl
    jc ERROR1    
    jmp main4
main3:        
    mov [di],al
    inc di
    xor dx,dx
    xor ax,ax        
main4:
    inc bx
    jmp main1  
main5:
    mov [di],al
    inc di
    mov [di],'$'
    call SHOWMAX
    xor ax,ax
    xor dx,dx
    call GETMAXNUM
    lea dx,outBuf
    mov ah,9
    int 21h        
    call NEWLINE
    call SHOWMIN
    call GETMINNUM
    lea dx,outBuf
    mov ah,9
    int 21h    
    call NEWLINE
    xor ax,ax
    xor dx,dx    
    mov cx,count    
    mov bx,offset arrNum
@@:    
    mov dl,[bx]
    add ax,dx
    jc ERROR2
    inc bx
    cmp [bx],'$'
    jnz @b         
    call INTTOSTREX
    call SHOWSUM
    lea dx,outBuf
    mov ah,9
    int 21h
    call NEWLINE
    call GETAVERAGE
    call INTTOSTREX
    call SHOWAVER
    lea dx,outBuf
    mov ah,9
    int 21h
    call NEWLINE
chkexit:
    call ISEXIT
    cmp al,4
    je EXIT   
    jmp NEXT
EXIT:    
    MOV AH,4CH
    INT 21H  
ERROR1:
    lea dx,errMsg1
    mov ah,9
    int 21h
    jmp NEXT  
ERROR2:
    lea dx,errMsg2
    mov ah,9
    int 21h
    jmp NEXT           
CODES ENDS
    END START