include

include

include

include

using namespace std;
///////////////////////////
typedef int type;
///////////////////////////

///////////////////////////
int main()
{
stack s1;
if(s1.empty())
cout<<"stack is empty now;"<<endl;
// stack::iterator it = s1.top();//stack and queue dosen't have iterator
for(int i=1;i<=5;i++)
s1.push(i);
cout<<"the size of s1 is "<<s1.size()<<endl;
while(!s1.empty())
{
cout<<s1.top()<<" ";
s1.pop();
}
for(int i=1;i<=5;i++)
s1.push(i);
cout<<endl;
stack s2;
for(int i=11;i<=20;i++)
s2.push(i);
swap(s1,s2);
cout<<"s1:";
while(!s1.empty())
{
cout<<s1.top()<<" ";
s1.pop();
}
cout<<endl<<"s2:";
while(!s2.empty())
{
cout<<s2.top()<<" ";
s2.pop();
}
cout<<endl;

}

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