[填空题] 下面程序的运行结果是 【9】 。
import java. io. * ;
public class ABC
public static void main( String args[ ] )
int i;
int a [ ] = 11, 22, 33, 44, 55, 66, 77, 88, 99 ;
for( i = 0 ;i< = a. length/2; i++)
System. out. print( a[i] + a[a. length - i - 1 ] +" ");
System. out. println( );