A.inta[2][]={1,2,3,4,5} B.inta[][2]={{0},{}} C.inta[2][2]={{1,2},{3}} D.inta[][]={1,2,3,4}
A.a[0][1/2] B.a[1][1] C.a[4-4][0] D.a[0][3]
若有定義:int i=0,x=0;int a[3][3]={1,2,3,4,5,6,7,8,9};則以下程序段運行后x的值為() for(;i<3;i++)x+=a[i][2-i];
A.0 B.12 C.15 D.18