A.char a[20]="abcdefg"; B.char a[]="x+y=55."; C.char a[15]={’1’,’2’}; D.char a[10]=’5’;
A.(n+1)/2 B.n/2+1 C.n/2-1 D.n-1
A.1~19 B.1~20 C.0~19 D.0~20