程序代码：

.386
.model flat,stdcall
.stack 4096
ExitProcess PROTO,dwExitCode:DWORD
g EQU <C>

.data
A DWORD 50
B DWORD 60
g DWORD 70
D DWORD 80
sum DWORD 0

.code
main PROC
    mov eax,A
    mov ebx,B
    mov ecx,g
    mov edx,D
    add eax,ebx
    add eax,edx
    sub eax,ecx
    
    mov sum,eax

    INVOKE ExitProcess,0
main ENDP
END main