试图添加两位数字并打印到VDU（总计低于100）

Question

我正在尝试添加两位数字并将结果打印到VDU，返回的最大数字不会超过3位数。

到目前为止，我已经能够为我的VDU添加一个两位数字，但我不确定如何重新复制这个数字并将数字加在一起。

我到目前为止所编写的代码是：

In 00
sub al, 30
mul al, 0a
push al

in 00
sub al, 30
pop bl
add al, bl

push al
mod al, 0a
add al, 30
mov [c1], al

pop al
div al, 0a
add al, 30
mov [c0], al
end

Answer 1

您似乎使用了大量无效8086或x86代码的指令！

in 00          Use a DOS function to get a character
mul al, 0a     Move the number 10 to an extra register
push al        Push a complete word to to stack
pop bl         Pop a complete word off the stack
mod al, 0a     Use the remainder you get from a division
div al, 0a     Move the number 10 to an extra register

这就是它的样子（没有应用优化）：

mov ah, 01h    Input a character for the tens
int 21h
sub al, 30h    Turn into number
mov bl, 10
mul al, bl     Multiplies AL by BL : So times 10
push ax

mov ah, 01h    Input a character for the units
int 21h
sub al, 30h    Turn into number
mov ah, 0      Clear AH so addition works correctly
pop bx
add ax, bx     Add tens and units


Here anything else!

mov bl, 10
div bl         Divides AX by BL : Gives remainder in AH, quotient in AL

add ah, 30h    Turn into character
mov [c1], ah

add al, 30h    Turn into character
mov [c0], al