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#ifndef STACK_DYNAMIC
#define STACK_DYNAMIC
template <class T>
class Stack {
T* vals;
unsigned topInd;
unsigned size;
void resize();
public:
Stack();
~Stack();
Stack(Stack& other) = delete;
Stack& operator=(const Stack& other) = delete;
void push(const T& v);
void pop();
T& top();
};
template <class T>
void Stack<T>::resize() {
unsigned newSize = size << 1;
T* newVals = new T[newSize];
for (unsigned i = 0; i < size; i++)
newVals[i] = vals[i];
delete vals;
vals = newVals;
size = newSize;
}
template <class T>
Stack<T>::Stack() {
vals = new T[1]; // for testing purposes its 1
}
template <class T>
Stack<T>::~Stack() {
delete[] vals;
}
template <class T>
void Stack<T>::push(const T& v) {
if (topInd == size)
resize();
vals[topInd++] = v;
}
template <class T>
void Stack<T>::pop() {
topInd--;
}
template <class T>
T& Stack<T>::top() {
return vals[topInd - 1];
}
#endif
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