一道关于位段及大小端的面试题

输出下面这一道题的输出：

struct mybitfields
{
    unsigned short a : 4;
    unsigned short b : 5;
    unsigned short c : 7;
} test

void main(void)
{
    int i;
    test.a = 2;
    test.b = 3;
    test.c = 0;
    i = *((short *)&test);
    printf("%d\n", i);
}

这道题的第一步首先你要清楚“：”的含义，冒号相当于分配几位空间。所