c++ - I am trying to reverse the stack using recursion. What is being passed in function fun()? s is an object of class stack - 


//reverse stack fun() , fun1()       /*i unable understand being passed in function fun().  not sure arguement of type stack <int> &s.  whole stack being passed or 1 node?*/       void fun1(stack<int> &s, int k) {    if ( s.empty())    {        s.push(k);        return;    }       int t = s.top(); s.pop();       fun1(s,k);       s.push(t);  }  **void fun(stack<int> &s)** {     if ( s.empty())     {         return;     }     int t = s.top(); s.pop();     fun(s);     fun1(s,t); }

the program trying reverse stack using functions fun() , fun1(). question arguement stack &s takes address of what?

in c++ reference alias existing variable. represented using ampersand (&); stack<int>& indicates reference stack<int>. arguments named s in functions fun , fun1 indicate references entire stacks, not individual nodes thereof.


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