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#include<iostream>
#define MAXSIZE 100using namespace std;typedef struct
{int *base;int *top;int stackSize;}SqStack;void Initstack( SqStack &s) // 初始化栈
{s.base = new int[MAXSIZE];s.top = s.base;s.stackSize = MAXSIZE; 
}void Push( SqStack &s , int u) // 插入元素 
{if(s.top - s.base == s.stackSize) {cout<<"栈满\n";  return; }*s.top = u;s.top++;}void Pop(SqStack &s , int &e) //弹出栈 
{if(s.top == s.base){cout<<"栈空\n";return;}e = *--s.top;
}int GetTop(SqStack s)
{if(s.top != s.base){return *(s.top-1);}}int main()
{SqStack s;Initstack(s);int e = 0;cout<<"输入插入元素,一直到输入-1:\n";while(e != -1) {cin>>e;if(e != -1)Push(s,e);}cout<<"弹出栈:";Pop(s,e);cout<<e<<'\n';cout<<"取出栈顶元素:";cout<<GetTop(s);return 0;
}