这是一个C面试测试问题不是家庭作业。

#include

using namespace std;

enum months_t { january, february, march, april, may, june, july, august, september,

october, november, december} y2k;

int main ()

{

cout << "sizeof months_t is " << sizeof(months_t) << endl;

cout << "sizeof y2k is " << sizeof(y2k) << endl;

enum months_t1 { january, february, march, april, may, june, july, august,

september, october, november, december} y2k1;

cout << "sizeof months_t1 is " << sizeof(months_t1) << endl;

cout << "sizeof y2k1 is " << sizeof(y2k1) << endl;

}

为什么所有大小都是4字节？不是12×4 = 48字节？

我知道联合元素占据相同的内存位置，但这是枚举。