;写一个完整的程序放在代码段C_SEG中,要求把数据段D_SEG中的
;AUGEND和附加段E_SEG中的ADDEND相加,并把结果存放在D_SEG段
;的SUM中.其中AUGEND,ADDEND和SUM均为双精度数,AUGEND赋值为
;99251,ADDEND赋值为-15926.
d_seg segment
org 1000h
augend dd 99251
sum dq ?
d_seg ends
e_seg segment
addend dd -15962
e_seg ends
code segment
assume ds:d_seg,es:e_seg,cs:code
start: mov ax,d_seg
       mov ds,ax
       mov ax,e_seg
       mov es,ax
       clc
       lea si,augend
       lea di,addend
       sub ax,ax
       cwd
       mov ax,ds:[si]
       mov dx,ds:[si+2]
       add ax,es:[di]
       adc dx,es:[di+2]
       lea si,sum
       mov ds:[si],ax
       mov ds:[si+2],dx
       jnc l1
       inc byte ptr ds:[si+4]
l1:    mov ah,4ch
       int 21h
code ends
       end start