声明数组实例:

; Test6_1.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.data;声明并初始化有三个元素的 DWORD 数组; 该数组每个元素是 4 字节val dd 11,22,33
.code
start:mov eax, valPrintDec eax     ;11mov eax, val[4]PrintDec eax     ;22mov eax, val[8]PrintDec eax     ;33ret
end start

上面的例子也可以这样写:

; Test6_2.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.dataval dd 11dd 22,33
.code
start:mov eax, val[4*0]PrintDec eax     ;11mov eax, val[4*1]PrintDec eax     ;22mov eax, val[4*2]PrintDec eax     ;33ret
end start

使用伪指令 DUP:

; Test6_3.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.data;声明有三个元素的 DWORD 数组, 并把每个元素初始化为 6v1 dd 3 dup(6);声明有三个元素的 DWORD 数组, 无初始化; 对全局变量, 没有初始化的将用 0 填充v2 dd 3 dup(?)
.data?;声明有三个元素的 DWORD 数组v3 dd 3 dup(?).code
start:DumpMem offset v1, 12  ;06 00 00 00 - 06 00 00 00 - 06 00 00 00DumpMem offset v2, 12  ;00 00 00 00 - 00 00 00 00 - 00 00 00 00DumpMem offset v3, 12  ;00 00 00 00 - 00 00 00 00 - 00 00 00 00ret
end start

现在可以区别未初始化的变量在 .data 段和 .data? 的区别:

; Test6_4.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.datav1 dd 4096 dup(?) ;未初始化变量在 .data 段, 生成的 exe 文件会根据大小分配内存
.code
start:PrintText 'Hi'ret
end start; ------------------------------------------------------
; 上面的程序的 exe 是 18944 字节
; 下面的程序的 exe 是 2560 字节
; 它们刚好相差 4096*4 个字节
; 结论: 不需要初始化的变量应该声明在 .data? 段
; ------------------------------------------------------; Test6_5.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.data?v1 dd 4096 dup(?) ;未初始化变量在 .data? 段
.code
start:PrintText 'Hi'ret
end start

继续 dup 的例子:

; Test6_6.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.dataval dd 2 dup(1,2,3)
.code
start:DumpMem offset val, 24 ;01000000-02000000-03000000-01000000-02000000-03000000ret
end start

嵌套数组:

; Test6_7.asm
.386
.model flat, stdcallinclude    windows.inc
include    kernel32.inc
include    masm32.inc
include    debug.inc
includelib kernel32.lib
includelib masm32.lib
includelib debug.lib.dataval dd 2 dup(3 dup(1,2))
.code
start:DumpMem offset val, 48 ;1 2 1 2 1 2  1 2 1 2 1 2ret
end start