For Assembly Language x86: I have the following code: which currently outputs :

Question

For Assembly Language x86:

I have the following code:

which currently outputs :

I would like to modify this so instead of printing out the first number of the array at the bottom, It will allow someone to pick which number they would like to output.

The output would look like:

Enter a number: 9

enter a number: 8

enter a number: 7

enter a number: 6

Pick which array number between 0-3 would you like to output:

2

8 ;// since they picked 2, it outputs the 2nd number that they entered.

.data ;// write your data in this section 13 14 15 16 17 18 19 20 21 myArray WORD 4 DUP(?) prompt BYTE "Enter a number" ,0ah, ødh, 0 prompt2 BYTE" pick a number within the array between 0-3 to output that number", 0ah, Odh, 0 .code // write your program here main proc mov eax, 0 mov edx, OFFSET prompt call Writestring call ReadInt mov myArray[o SIZEOF WORD], ax 23 24 25 26 27 28 29 30 31 32 call Writestring call ReadInt mov myArray[1*SIZEOF WORD], ax call Writestring call ReadInt mov myArray[2 * SIZEOF WORD1, ax 34 35 36 37 38 39 40 41 42 43 call Writestring call ReadInt mov myArray[3 * SIZEOF WORD], ax mov ax, myArray[0*SIZEOF WORD] call WriteDec call Crlf invoke ExitProcess,0 45 main endp

Explanation / Answer

.386

.model flat,stdcall

.stack 4096

ExitProcess proto,dwExitCode:dword

WriteString proto

ReadInt proto

WriteDec proto

Crlf proto

.data ;

myArray WORD 4 DUP(?)

prompt BYTE "Enter a number" ,0ah, 0dh, 0

prompt2 BYTE " pick a number within the array between 0-3 to output that number" , 0ah, 0dh , 0

.code ; // write your program here

main proc

mov eax, 0

mov edx, OFFSET prompt

call Writestring

call ReadInt

mov myArray[0*SIZEOF WORD], ax

call WriteString

call ReadInt

mov myArray[1*SIZEOF WORD], ax

call WriteString

call ReadInt

mov myArray[2 * SIZEOF WORD], ax

call WriteString

call ReadInt

mov myArray[3 * SIZEOF WORD], ax

mov edx, OFFSET prompt2

call WriteString

call ReadInt ; value is stored in eax

mov ebx, SIZE WORD

mul ebx ; multiplies eax with size of word

mov ax, [myArray + eax]

call WriteDec

call Crlf

invoke ExitProcess,0

main endp

end main

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