int _tmain(int argc, _TCHAR* argv[])
{
    struct v1 {
        int a;
        short b;
        char c;
        int d;
        double e;
    };
    v1* heap_struct = (v1*)malloc(sizeof(v1));
    heap_struct->a = 10;
    heap_struct->b = 20;
    heap_struct->c = 30;
    heap_struct->d = 40;
    heap_struct->e = 50;
    return 0;

}

push    24              ; Size
call    ds:__imp__malloc
add     esp, 4
cmp     esi, esp
call    j___RTC_CheckEsp
mov     [ebp+heap_struct], eax
mov     eax, [ebp+heap_struct]
mov     dword ptr [eax], 10
mov     eax, 20
mov     ecx, [ebp+heap_struct]
mov     [ecx+4], ax
mov     eax, [ebp+heap_struct]
mov     byte ptr [eax+6], 30
mov     eax, [ebp+heap_struct]
mov     dword ptr [eax+8], 40
mov     eax, [ebp+heap_struct]
fld     ds:__real@4049000000000000
fstp    qword ptr [eax+10h]

原类型     大小             偏移
int         4（dword）       0
short       2（）            4
char        1（byte）        6
int         4（dword）       8
double      8（qword）      16