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I wonder how do I have to pass pointer argument to procedure?

I have to create function who have 2 arguments:

  1. words array
  2. array's size

The function gets array that the array's size and sum the column.

That's what I've coded:

 .MODEL Small .STACK 64 ; +===============================+ ; | DATA | ; +===============================+ .DATA array1 dw 1,2,3,4 array1size dw 4 result dw ? address dw ? ; print TMP dw 0 ; general temporary variable .. .code addNumbers proc ; reset result lea di,result ; use stack mov bp,sp ; get num array mov bx,[bp+2] ; get num of numbers mov cx,[bp+4] ; making additiontion adding: add [di],bx inc bx; go to the next bx loop adding ret 2 endp ; start start: mov ax,@DATA mov ds,ax ; set strings push array1size push offset array1 call addNumbers ; print mov dx:ax,result call printNumber mov ah,4ch mov al,0 int 21H end start

the problem - it's adding to result the offset pointer (here is cs:0000,cs:0001,cs:0002,cs:0003) and not the offset value (here is: 1,2,3,4).

Because of this, result will be 6 and not 10.

could someone help me?

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1 Answer 1

Reset to default
2 
INC BX

will of course add 1 (byte) to the pointer in BX. If you need to move one WORD, you have to add the size of the word. Say that is 2 bytes, then you need 

ADD BX, 2

instead of the INC.

Your other problem is that you don't add the values pointed-to, [BX], but the pointers themselves BX. You might use a spare register, like AX to compute the sum.

 MOV AX,0 adding: ADD AX,[BX] ADD BX,2 LOOP adding MOV [result],AX RET 4
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