我的任务是构建一个替换2个指针值的函数。
有我的代码：
org 100h
jmp main
toSwap1 db 'a'
toSwap2 db 'b'
result dw ?
numToNeg dw -9
string db 'm', 'a', 'g', 's', 'h', 'i', 'm', 'i', 'm', 'v', 'e', 'n', 'e', 'h', 'e', 'n', 'i', 'm' ,0Dh,0Ah,'$'
array db "0000", 0Dh,0Ah, 24h ; line feed return and stop symbol 24h=$ (ASCII).
num1 dw 0xAC45
; There is some vars thats i need for other missions
main:
; Second function: should print b and a - MAIN CODE FOR FUNC ~
push offset toSwap1
push offset toSwap2
call xChange
mov al, toSwap1
call print_al_chr
PRINTN "and"
mov al, toSwap2
call print_al_chr
mov ah, 0
int 16h
ret
xChange proc ; THE FUNC ~
push bp
push ax
push bx
push cx
mov bp, sp
mov bx, [bp + 12]
mov al, [bx]
mov bx, [bp + 10]
mov cx, [bx]
mov [bx], ax
mov bx, [bp + 12]
mov [bx], cx
pop cx
pop bx
pop ax
pop bp
retn 4
xChange endp
现在的问题是第二个var的值（那应该在函数末尾打印'a'了）。 图片： enter image description here
