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3lab.asm
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3lab.asm
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.model small
.stack 100h
.data
.386
MaxArrayLength equ 30
ArrayLength dw ?
InputArrayLengthMsgStr db 'Input array length: $'
maxNull db 0Ah,0Dh,'All infinity','$',0Ah,0Dh
ErrorInputMsgStr db 0Ah,0Dh,'Incorrect value!',0Ah,0Dh, '$'
ErrorInputArrayLengthMsgStr db 0Ah,0Dh,'Array length should be not less than 0 and not bigger than 30!', '$'
InputMsgStr db 0Ah, 0Dh,'Input element (-32 768..32 767) : $'
CurrentEl db 2 dup(0)
Answer db 20 dup('$'), 0Ah,0Dh, '$'
NumBuffer dw 0
NumLength db 7
EnterredNum db 9 dup('$')
nextStr db 0Ah,0Dh,'$'
ten dw 10
two dw 2
precision db 5
minus db 0
Max dw 0
MaxTemp dw 0
Array dw MaxArrayLength dup (0)
Temp dd 0
OutputArray dd MaxArrayLength dup(0)
.code
start: ;
mov ax,@data ;
mov ds,ax ;
;
xor ax,ax ;
;
call inputMas ;
call FindMax ;
call MakeNormal
;
inputMas proc
call inputArrayLength ;
call inputArray ;
ret ;
endp
inputArrayLength proc near
mov cx, 1
inputArrayLengthLoop:
call ShowInputArrayLengthMsg
push cx ;
call inputElementBuff
pop cx
mov ArrayLength,ax
cmp ArrayLength,0
jle lengthError
cmp ArrayLength,30
jg lengthError
loop inputArrayLengthLoop
ret
endp
lengthError:
call ErrorInput
jmp inputArrayLengthLoop
inputArray proc
xor di,di
mov cx,ArrayLength
inputArrayLoop:
call ShowInputMsg
push cx ;
call inputElementBuff
pop cx
mov Array[di], ax
add di,2
loop inputArrayLoop
ret
endp
resetNumBuffer proc
mov NumBuffer, 0
ret
endp
inputElementBuff proc
xor ax,ax
xor cx,cx
mov al,NumLength
mov [EnterredNum],al
mov [EnterredNum+1],0
lea dx,EnterredNum
call input
mov cl,[EnterredNum+1]
lea si,EnterredNum
add si,2
xor ax,ax
xor bx,bx
xor dx,dx
mov dx,10
NextSym:
xor ax,ax
lodsb
cmp bl,0
je checkMinus
checkSym:
cmp al,'0'
jl badNum
cmp al,'9'
jg badNum
sub ax,'0'
mov bx,ax
xor ax,ax
mov ax,NumBuffer
imul dx
jo badNum
cmp minus,1
je doSub
add ax, bx
comeBack:
jo badNum
mov NumBuffer,ax
mov bx,1
mov dx,10
loop NextSym
mov ax,NumBuffer
;cmp minus,0
;je finish
;mov dx,-1
;mul dx
mov minus,0
finish:
call resetNumBuffer
ret
doSub:
sub ax,bx
jmp comeBack
checkMinus:
inc bl
cmp al, '-'
je SetMinus
jmp checkSym
SetMinus:
mov minus,1
dec cx
cmp cx,0
je badNum
jmp NextSym
badNum:
clc
mov minus,0
call ErrorInput
call resetNumBuffer
jmp inputElementBuff
endp
input proc near
mov ah,0Ah
int 21h
ret
input endp
ErrorInput proc ;
lea dx, ErrorInputMsgStr ;
mov ah, 09h ;
int 21h ;
ret ;
endp ;
ShowInputArrayLengthMsg proc
push ax
push dx
mov ah,09h
lea dx, InputArrayLengthMsgStr
int 21h
pop dx
pop ax
ret
endp
;
ShowInputMsg proc ;
push ax
push dx ;
;
mov ah,09h ;output command
lea dx, InputMsgStr ;show input msg to user
int 21h
pop dx
pop ax
ret
endp
;
FindMax proc near
xor di,di
mov cx, ArrayLength
mov ax,Array[di]
add di,2
dec cx
cmp cx,0
je endFind
find:
cmp cx,0
je endFind
mov dx,Array[di]
cmp ax,dx
jl saveMax
add di,2
loop find
jmp endFind
saveMax:
mov ax,dx
add di,2
dec cx
jmp find
endFind:
mov Max,ax
mov MaxTemp,ax
ret ;
endp ;
MakeNormal proc near
cmp Max,0
je divNull
xor cx,cx
mov cl,byte ptr [ArrayLength]
xor di,di
xor si,si
xor ax,ax
xor dx,dx
make:
mov ax,MaxTemp
mov Max,ax
mov minus,0
cmp cl,0
je goEnd
xor dx,dx
mov ax, Array[si]
xor ch,ch
lea di,Answer
cmp Max,0
jg setZnak
cmp Max,0
jl setPlus
return2:
mov [di],'+'
inc di
makeNum:
cmp ch,precision
jg saveNum
mov bx,ax
idiv Max
cmp minus,0
jne jump
call makeMainPart
cmp minus,1
je incMinus
jump:
cmp ax,0
je increase
add al,'0'
mov [di],al
inc di
mov ax,dx
imul ten
inc ch
jmp makeNum
incMinus:
mov ax,dx
mul ten
inc minus
jmp makeNum
increase:
add al,'0'
mov [di],al
inc di
cmp minus,0
je firstSymbol
return:
inc ch
mov ax,bx
imul ten
jmp makeNum
saveNum:
call output
add si,2
jmp make
goEnd:
mov ax,4c00h
int 21h
ret
endp
makeMainPart proc near
push dx
push cx
push bx
xor cx,cx
st:
xor dx,dx
idiv ten
cmp ax,0
jnz go1
cmp dx,0
jnz go1
jmp fin
go1:
inc cx
push dx
jmp st
fin:
loop1:
cmp cx,0
jz ifNoMainPart
pop bx
add bx,'0'
mov [di],bx
inc di
loop loop1
mov [di],'.'
inc di
jmp fin2
ifNoMainPart:
mov [di],'0'
inc di
mov [di],'.'
inc di
fin2:
mov minus,1
pop bx
pop cx
pop dx
ret
endp
setPlus:
push ax
mov ax,Max
mov bx,-1
imul bx
mov Max,ax
pop ax
imul bx
jmp return2
setZnak:
cmp ax,0
jge return2
mov [di],'-'
inc di
mov bx,-1
imul bx
jmp makeNum
;firstSymbol1:
; mov al,'.'
; mov [di],al
; inc di
; jmp return1
firstSymbol:
mov al,'.'
mov [di],al
inc di
mov minus,1
jmp return
;
output proc
lea dx,nextStr
mov ah,09h
int 21h ;
lea dx, Answer
mov ah,09h
int 21h
dec cl
ret ;
endp ;
divNull:
lea dx,maxNull
mov ah,09h
int 21h
mov ax,4c00h
int 21h
ret ;
end start ;