C語言：數組初始化第一個元素

#include <stdio.h>

int main()
{
	int arr[10] = {0xFF};
	
	for(int i = 0; i < 10; i++)
	{
		printf("arr[%d] = %d\n", i, arr[i]);
	}

	return 0;
}

uidh2917@hiv3209u:~/Source$ gcc TestArray.c
uidh2917@hiv3209u:~/Source$ 
uidh2917@hiv3209u:~/Source$ ./a.out
arr[0] = 255
arr[1] = 0
arr[2] = 0
arr[3] = 0
arr[4] = 0
arr[5] = 0
arr[6] = 0
arr[7] = 0
arr[8] = 0
arr[9] = 0