//z16.c
#include <stdio.h>
#include<stdlib.h>
#define A_SIZE 20

int main()
{

int i, a[A_SIZE] = { 1, 2, [A_SIZE/2] = 1, 2 };// a[10]=1, a[11]=2

	for(i=0; i<A_SIZE; i++)
	{
		printf("\na[%d]=%d", i, a[i]);
	}
	return EXIT_SUCCESS;
}