#include<iostream>
#include<string>
using namespace std;
struct node
{
int data;
node *next;
};
struct stack
{
node *top;
node *bottom;
};
void initstack(stack *&s)
{
s->top=s->bottom=NULL;
s->top=NULL;
}
int emptystack(stack *s)
{
if(s->top==s->bottom)
return 1;
return 0;
}
void buildstack(stack *&s,int d)
{
node *pnew=new node;
pnew->data=d;
pnew->next=s->top;
s->top=pnew;
}
int Outstack(stack *s)
{
return s->top->data;
}
void popstack(stack *&s)
{
s->top=s->top->next;
}
int main()
{
stack *s=new stack;
initstack(s);
int n;
cin>>n;
for(int i=0;i<n;i++)
{
int d;
cin>>d;
buildstack(s,d);
}int i=0;
while(!emptystack(s)&&i!=3)
{
cout<<Outstack(s)<<endl;
popstack(s);
}
return 0;
}
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最新推荐文章于 2020-10-07 23:52:22 发布