#include "ArrayStack.h"

ArrayStack::ArrayStack(int cap) {
  capacity = cap;
  stackSize = 0;
  array = new int[capacity];
}

int ArrayStack::size() {
  return stackSize;
}

void ArrayStack::push(int o) {
  if(stackSize==capacity) {
    int *_array = new int[2*capacity];
    for(int i=0; i<stackSize; i++)
      _array[i] = array[i];
    delete[] array;
    array = _array;
  }
  array[stackSize++] = o;
}

int ArrayStack::pop() {
  return array[--stackSize];
}

int ArrayStack::top() {
  return array[stackSize];
}