一个嵌套循环

numberA db 0 ；乘数
numberB db 0 ；被乘数

mov ax,0
mov cl,10

againA:
inc numberA
cmp cl,numberA
jz exit
againB:
inc numberB
cmp cl,numberB
jz againA

print:
mov al,numberA
add al,30h
mov dl,al
mov ah,2
int 21h ;print numberA
mov dl,'*'
mov ah,2
int 21h ;print '*'
mov al,numberB
add al,30h
mov dl,al
mov ah,2
int 21h ;print numberB
mov dl,'='
mov ah,2
int 21h ;print '='
call printNum ;print product ,to pass over the procedure.
mov dl,','
mov ah,2
int 21h
jmp againB

[此贴子已经被作者于2006-5-22 12:12:25编辑过]

一个嵌套循环

numberA db 0 ；乘数
numberB db 0 ；被乘数

mov ax,0
mov cl,10

againA:
inc numberA
cmp cl,numberA
jz exit; 这是什么意思？
againB:
inc numberB
cmp cl,numberB
jz againA

print:
mov al,numberA
add al,30h
mov dl,al
mov ah,2
int 21h ;print numberA
mov dl,'*'
mov ah,2
int 21h ;print '*'
mov al,numberB
add al,30h
mov dl,al
mov ah,2
int 21h ;print numberB
mov dl,'='
mov ah,2
int 21h ;print '='
call printNum ;print product ,to pass over the procedure.；本程序中没有编写printNum子程序，怎么调用程序？
mov dl,','
mov ah,2
int 21h
jmp againB

嵌套循环里，numberA作为外层循环哨兵，numberB作为内层循环哨兵，cmp cl,numberA 乘数等于10 转exit退出，程序里我没有给出exit,显然exit是跟在上面代码最后面、那个打印乘积的部分我都说了省略嘛，其实就是打印乘积，因为要把两位数打印有点麻烦，所以我没有完全实现这个代码，你可以参考我在kill444的“课程设计”帖子里写的子程序、