#include "StdAfx.h"
#include "PointerStack.h"

using namespace std;

PointerStack::PointerStack(void){
    _dataArray = new int[10];
    _size = 10;
    _elements = 0;
}

PointerStack::PointerStack(int maxSize){
    _dataArray = new int[maxSize];
    _size = maxSize;
    _elements = 0;
}

PointerStack::~PointerStack(void){
    delete _dataArray;
}

int PointerStack::maxSize(){
    return _size;
}

int PointerStack::size(){
    return _elements;
}

bool PointerStack::isEmpty(){
    if(_elements == 0){
        return true;
    }else{
        return false;
    }
}

bool PointerStack::isFull(){
    if(_elements == _size){
        return true;
    }else{
        return false;
    }
}

void PointerStack::push(int value){
    if(_elements<_size){
        *(_dataArray+_elements) = value;
        _elements++;
    }
}

int PointerStack::pop(){
    if(_elements>0){
        _elements--;
        return *(_dataArray+_elements);
    }else{
        return 0;
    }
}

int PointerStack::top(){
    if(_elements>0){
        return *(_dataArray+_elements-1);
    }else{
        return 0;
    }
}

string PointerStack::toString(){
    stringstream stream;
    stream << "Values: ";
    for(int i = 0; i<_elements;i++){
        stream << "[" <<*(_dataArray+i) << "]";
    }
    return stream.str();
}