汇编-sub指令-JZTXT

SUB指令从目的操作数中减去源操作数。指令的语法为：
SUB dest， source

.386  
.model flat,stdcall 
option casemap:none

.data   
var1 DWORD 30000h 
var2 DWORD 10000h


ExitProcess PROTO,dwExitCode:DWORD      

.code  
main PROC   
    mov eax,var1    ;EAX=30000h
    sub eax, var2    ;EAX=20000h

      
INVOKE ExitProcess,0  
main ENDP   
END main