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Copy pathCStack.cpp
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71 lines (71 loc) · 966 Bytes
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#include<iostream>
#include<queue>
using namespace std;
template<class T>
class Stack
{
public:
Stack()
{}
~Stack()
{}
void AppendTail(const T data)
{
if (q1.empty())
{
q2.push(data);
}
else
{
q1.push(data);
}
}
T DeleteHead()
{
T ret=0;
if (q1.empty() && q2.empty())
{
cout << "stack is empty!" << endl;
return ret;
}
if (q1.empty())
{
while (q2.size()>1)
{
q1.push(q2.front());
q2.pop();
}
ret = q2.front();
q2.pop();
}
else
{
while (q1.size()>1)
{
q2.push(q1.front());
q1.pop();
}
ret = q1.front();
q1.pop();
}
return ret;
}
private:
queue<T> q1;
queue<T> q2;
};
int main()
{
Stack<int> s;
s.AppendTail(1);
s.AppendTail(2);
s.AppendTail(3);
cout << s.DeleteHead() << endl;
cout << s.DeleteHead() << endl;
s.AppendTail(4);
cout << s.DeleteHead() << endl;
cout << s.DeleteHead() << endl;
cout << s.DeleteHead() << endl;
system("pause");
return 0;
}