I have a code im trying to add to visual studio c++ to give me an output and im lost

Question

1.00/5 (2 votes)

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.data
array1 DWORD 10d,20d,30d,40d,50d,60d,70d,80d,90d
.code
main PROC
mov ESI, OFFSET array1 ;ESI now points to the first item of array1
mov EDI, SIZEOF array1
add EDI, OFFSET array1
sub EDI, TYPE array1 ;EDI now points to the last item of array1

mov ECX, LENGTHOF array1
shr ECX, 1 ;now ecx is half the length of the array1
L1: mov EAX, [ESI] ;in this loop we reverse the items of the array
mov EBX, [EDI]
mov [EDI],EAX
mov [ESI],EBX
add ESI, TYPE array1
sub EDI, TYPE array1
LOOP L1

mov ECX, LENGTHOF array1;here we just print the array
mov ESI, OFFSET array1
L2: MOV EAX, [ESI]
call WriteInt
call Crlf
add ESI, TYPE array1
LOOP L2
exit
main ENDP
END main

This is the code i have to add to my project but im not sure how i convert it into c++ to work.

Posted 11-Nov-15 9:21am

YeezyGod

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Comments

ZurdoDev 11-Nov-15 15:28pm

You re-write it to get it into C++.

Richard MacCutchan 11-Nov-15 15:37pm

Without knowing what it is supposed to do it is difficult to make a suggestion.

YeezyGod 11-Nov-15 16:16pm

Its suppose to Use a loop with indirect or indexed addressing to reverse the elements of an integer array in place using the SIZEOF, TYPE, and LENGTHOF operators.

Richard MacCutchan 11-Nov-15 16:34pm

That should not be too difficult to write in C/C++ then.

Sergey Alexandrovich Kryukov 11-Nov-15 21:49pm

C++?!
—SA

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bling · Accepted Answer · 2015-11-11T10:39:00

This code assumes you have the _countof macro defined.

https://msdn.microsoft.com/en-us/library/ms175773.aspx[^]

C++

#include <stdio.h>

// array1 DWORD 10d,20d,30d,40d,50d,60d,70d,80d,90d

static long words[] = {10, 20, 30, 40, 50, 60, 70, 80, 90};

int main(int argc, char *argv[])
{
    // swap the array.
    unsigned count = _countof(words);
    unsigned half = _count / 2;
    for (unsigned i = 0; i < half; i++)
    {
        long swap = words[i];
        words[i] = words[count - i - 1];
        words[count - i - 1] = swap;        
    }

    // print the array.
    for (unsigned i = 0; i < half; i++)
    {
        printf(" %ld", words[i]);
    }
    return 0;
}
</stdio.h>

You know, it would be simpler to just print the numbers in reverse order.

C++

#include <stdio.h>

static long words[] = {10, 20, 30, 40, 50, 60, 70, 80, 90};

int main(int argc, char *argv[])
{
    // print the array.
    unsigned i = _countof(words);
    while (i > 0)
    {
        printf(" %ld", words[--i]);
    }
    return 0;
}
</stdio.h>