汇编语言

a = 3*a - 2*b +1 //把表达式 3a-2b+1的结果赋值给 a

汇编语言/机器代码：

mov eax, dword ptr a_$[ebp]           8b 45 fc
lea   eax, dword ptr [eax+eax*2]      8d 04 40
mov ecx, dword ptr b_$[ebp]           8b 4d f8
add ecx,ecx                                         03 c9
sub eax,ecx                                         2b c1
inc eax                                                  40
mov dword ptr a_$[ebp],eax             89 45 fc