// File: StackType.cpp

#include "StackType.h"

StackType::StackType()

{

top = -1;

}

bool StackType::IsEmpty() const

{

return (top == -1);

}

bool StackType::IsFull() const

{

return (top == MAX_ITEMS-1);

}

void StackType::Push(ItemType newItem)

{

if( IsFull() )

cout<<"Fullstack exception thrown";

else

{

top++;

items[top] = newItem;

}

}

void StackType::Pop()

{

if( IsEmpty() )

cerr<<"Empty exception thrown"<<endl;

else

top--;

}

ItemType StackType::Top()

{

if (IsEmpty())

{

cerr<<"Empty exception thrown"<<endl;

exit(1);

}

else

{

return items[top];

}

}