리눅스 시스템 프로그래밍을 공부하고 있는데요. struct 내에 배열 선언시 int score[0]; 처럼 할 수가 있더군요 도와주세요

	char * pp = "TEST";
	printf("char * pp = \"TEST\";\n");
	printf("pp           %x\n", pp);
	printf("sizeof(p)  %d\n", sizeof(pp));
	printf("\n");
 
#if 0
char * pp = "TEST";
pp               489000
sizeof(pp)    4
#endif

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
 
 
typedef struct
{
	int count;
	char name[20];
	int score[0];
} FLEX;
 
#define TEST 10
 
int main(int argc, char** argv)
{
	int i, j;
 
	printf("#define TEST 10\n");
	printf("%x\n", TEST);
	printf("\n");
 
	const int TMP = 30;
	printf("%x\n", TMP);
	printf("%x\n", &TMP);
	printf("\n");
 
	int score[0];
	printf("int score[0];\n");
	printf("sizeof(score)       %d\n", sizeof(score));
	printf("sizeof(&score[0])   %d\n", sizeof(&score[0]));
	printf("&score[0]           %x\n", &score[0]);
	printf("\n");
 
	int score1[1];
	printf("int score1[1];\n");
	printf("sizeof(score1)      %d\n", sizeof(score1));
	printf("sizeof(&score1[0])  %d\n", sizeof(&score1[0]));
	printf("&score1[0]          %x\n", &score1[0]);
	printf("\n");
 
	int score2[2];
	printf("int score2[2];\n");
	printf("sizeof(score2)      %d\n", sizeof(score2));
	printf("sizeof(&score2[0])  %d\n", sizeof(&score2[0]));
	printf("&score2[0]          %x\n", &score2[0]);
	printf("\n");
 
	char ccore[0];
	printf("char ccore[0];\n");
	printf("sizeof(ccore)       %d\n", sizeof(ccore));
	printf("sizeof(&ccore[0])   %d\n", sizeof(&ccore[0]));
	printf("&ccore[0]           %x\n", &ccore[0]);
	printf("\n");
 
	char ccore1[1];
	printf("char ccore1[1];\n");
	printf("sizeof(ccore1)      %d\n", sizeof(ccore1));
	printf("sizeof(&ccore1[0])  %d\n", sizeof(&ccore1[0]));
	printf("&ccore1[0]          %x\n", &ccore1[0]);
	printf("\n");
 
	FLEX *p = (FLEX *)malloc( sizeof(FLEX) );
 
	printf("FLEX *p = (FLEX *)malloc( sizeof(FLEX) );\n");
	printf("_msize(p)          %d\n", _msize(p));
	printf("sizeof(p->name)    %d\n", sizeof(p->name));
	printf("sizeof(p->score)   %d\n", sizeof(p->score));
	printf("\n");
 
//--------------------------------
//할당안된 주소를 사용
//	for(i=0; i<5; i++)
//		p->score[i] = i + 1;
 
//	for(j=0; j<5; j++)
//		printf("p->score[ %d] = %d   %x\n", j, p->score[j], p->score[j]);
//--------------------------------
 
	free(p);
 
	return 0;
}
 
#if 0
 
#define TEST 10
a
 
1e
22fee8
 
int score[0];
sizeof(score)       0
sizeof(&score[0])   4
&score[0]           22fee8
 
int score1[1];
sizeof(score1)      4
sizeof(&score1[0])  4
&score1[0]          22fee4
 
int score2[2];
sizeof(score2)      8
sizeof(&score2[0])  4
&score2[0]          22fedc
 
char ccore[0];
sizeof(ccore)       0
sizeof(&ccore[0])   4
&ccore[0]           22fedc
 
char ccore1[1];
sizeof(ccore1)      1
sizeof(&ccore1[0])  4
&ccore1[0]          22fedb
 
FLEX *p = (FLEX *)malloc( sizeof(FLEX) );
_msize(p)          24
sizeof(p->name)    20
sizeof(p->score)   0
 
 
--------------------------------
Process exited after 0.6057 seconds with return value 0
계속하려면 아무 키나 누르십시오 . . .
 
#endif