求一道简单的C语言面试题

#include <stdio.h>

typedef struct {

unsigned int a : 1;
unsigned int b : 1;
unsigned int c : 1;

} m;

int main(int argc,char *argv[])
{
m k;
k.a = 1;
k.b = 0;
k.c = 0;

printf("%d, %d, %d, %d\n", sizeof(k), k.a, k.b, k.c);
return 0;
}

题目呢？