A.1 B.0 C.“abAaba” D.-1
A.隊(duì)列是后進(jìn)先出 B.棧的特點(diǎn)是后進(jìn)后出 C.棧的刪除和插入操作都只能在棧頂進(jìn)行 D.隊(duì)列的刪除和插入操作都只能在隊(duì)頭進(jìn)行
A.top->data=x; B.top=top->next; C.x=top->data; D.x=top->data;top=top->next;