问题
选择题
Who is considered ________ the telephone, do you know?[ ]
A. inventing
B. having invented
C. to have invented
D. to invent
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Who is considered ________ the telephone, do you know?[ ]
A. inventing
B. having invented
C. to have invented
D. to invent
答案：C
STACK（即栈类型）的定义省略，栈的基本操作的函数原型说明如下：voidInitStack（STACK*S）：初始化一个空栈。voidPush（STACK*S，chare）：将一个字符压栈，栈中元素数目增1。voidPop（STACK*S）：栈顶元素出栈，栈中元素数目减1。charTop（STACKS）：返回非空栈S的栈顶元素值，栈中元素数目不变。intIsEmpty（STACKS）：若S是空栈，则返回1，否则返回0。【C函数】