我正在开发一个可以绘制随机形状的 nasm 程序。我从这段代码开始，但每次编译时，我都会收到错误
bresen.asm:8：错误：操作数 1 后应有逗号
这是代码::
segment stack stack
resb 100 ;declares a stack segment containing 64 bytes of uninitialised stack space, and points stacktop at the top
stacktop:
segment data
dex dw 0
dy dw 0
x_add dw 0
y_add dw 0
maxd dw 0
act_dx dw 0
act_dy dw 0
c dw 0
x1 dw 0
y1 dw 0
x2 dw 0
y2 dw 0
segment code
start:
mov ax,data
mov ds,ax
mov ax,stack
mov ss,ax
mov sp,stacktop
mov bp,stacktop
;init finished
mov ah,0h
mov al,13h
int 10h
;screen set
mov ax,word 200
push ax ;y2
mov ax,word 50
push ax ;x2
mov ax,word 20
push ax ;y1
mov ax,word 65
push ax ;x1
call line
;line(x1,y1,x2,y2)
xor ax,ax
int 16h
;wait key
mov ah,0
mov al,3
int 10h
;go back to text mode
mov ah,4ch
int 21h
;end
line:
push bp
mov bp,sp
mov ax,[bp+4] ;<-1 here
mov [y2],ax
mov ax,[bp+6]
mov [x2],ax
mov ax,[bp+8]
mov [y1],ax
mov ax,[bp+10]
mov [x1],ax
;init-line end here!!!
mov ax,[x2]
sub ax,[x1]
cmp ax,0
jnl abs1
neg ax
abs1: mov [dex],ax
;dex=abs(x2-x1)
mov ax,[y2]
sub ax,[y1]
cmp ax,0
jnl abs2
neg ax
abs2: mov [dy],ax
;dy=abs(y2-y1)
mov ax,[x1]
cmp ax,[x2]
jl min
mov [x_add],word -1
jmp end
min: mov [x_add],word 1
end:
;if (x1>x2)
mov ax,[y1]
cmp ax,[y2]
jl min2
mov [y_add],word -1
jmp end2
min2: mov [y_add],word 1
end2:
;if (y1>y2)
mov ax,[dy]
cmp ax,[dex]
jl min3
mov ax,[dy]
mov [maxd],ax
jmp end3
min3: mov ax,[dex]
mov [maxd],ax
end3:
mov cx,[maxd]
here: mov ax,[dy]
add [act_dy],ax
mov ax,[act_dy]
cmp ax,[maxd]
jl next
mov ax,[maxd]
sub [act_dy],ax
mov ax,[y_add]
add [y1],ax
next: mov ax,[dex]
add [act_dx],ax
mov ax,[act_dx]
cmp ax,[maxd]
jl next2
mov ax,[maxd]
sub [act_dx],ax
mov ax,[x_add]
add [x1],ax
next2: call plot
loop here
mov sp,bp
pop bp
ret 8
plot:
push ax
push bx
push cx
push dx
mov ah,0ch
mov dx,[y1]
mov cx,[x1]
mov al,0d0h ;change this to change the point-color
mov bh,0h
int 10h
pop dx
pop cx
pop bx
pop ax
ret
我试图找出原因，但它让我停滞了很长时间。我将不胜感激任何反馈或疑问。