assembly - Macro in loop works once, then doesn't -

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procedure readval should loop , ask user input 10 integers (as strings), storing each in array. readval uses macro getstring , works first time through. other 9 times, prints "please enter unsigned integer:" not stop allow user enter value. so, it's calling macro, why not stop , wait input next 9 times.

include irvine32.inc len = 10    ; number of elements in array.  getstring   macro   buffer, size     push eax     push ecx     push edx     mov edx,    offset  usermsg_2     call writestring     mov edx, buffer             ; buffer passed reference, no offset req'd.     mov eax, size     mov ecx, [eax]              ; dereference sizeelem ecx counter.     call readstring     pop edx     pop ecx     pop eax endm  .data usermsg_2   byte        "please enter unsigned number: ",0 array dword len dup(?)     arlength    dword   len     sizeelem    byte    11      ; number of digits allowed in. reading ints strings.     holder  dword   ?           ; temp memory location storing string input/output. .code main proc     push offset array     push offset arlength     push offset sizeelem     push offset holder     call readval exit main endp  readval proc     push ebp     mov ebp, esp     push ecx     mov esi, [ebp+20]               ; esi has starting address of array.     mov eax, [ebp+16]               ; @arlength     mov ecx, [eax]                  ; ecx gets arlength.     cmp ecx, 0     je l2 l1:     getstring [ebp+8], [ebp+12]  ; [ebp+8] gets user inputted string.     mov esi,    [ebp+8]          ; mov string in holder array[esi].     add esi, type   dword     loop l1 l2:     pop ecx     pop ebp     ret 16 readval endp end main

i think problem readstring expects value in ecx dword. giving number byte confusing it. declaring sizeelem dword solves issue.

you might want declare holder using bytes instead of dword while you're @ too, think that's more typical of string storage.


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