i++和++i的本质区别

int a = ++i;
8B 45 F8 mov eax,dword ptr [i]
83 C0 01 add eax,1
89 45 F8 mov dword ptr [i],eax
8B 4D F8 mov ecx,dword ptr [i]
89 4D EC mov dword ptr [a],ecx

int a = i++;
8B 45 F8 mov eax,dword ptr [i]
89 45 EC mov dword ptr [a],eax
8B 4D F8 mov ecx,dword ptr [i]
83 C1 01 add ecx,1
89 4D F8 mov dword ptr [i],ecx