Click on stack.h to get source.
// File Circlist/MultInher/stack.h
#include "circlist.h"

class stack : public virtual circlist {
public:
      stack(void)     {}
 void push(int x);
 int  pop(void);
};

void stack::push(int x) { circlist::push(x); }

int  stack::pop(void)       { return circlist::pop(); }