【单选题】【消耗次数:1】
从一个栈顶指针为top的链栈中取栈顶元素,用变量x保存该元素的值,则执行( )。
A.x=top- top=top?next;
B.x=top
-C.top=top- x=top-
D.top=top- x=data;
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相关题目
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①  正确
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