/*
 *
 private:
     char data[MAX_STACK_SIZE];
     int top;
     int size; 
 */

StackT::StackT() {
    top = 0;
    size = 0;
}

void StackT::Push(char newData) {
    if (top <  MAX_STACK_SIZE) {
        data[top] = newData; 
        top++;
        size++;
    } else {
        // some kind of stack error
    }
}


void StackT::Pop(){
    if (top > 0) {
        top--;
        size--;
    } else {
        // some kind of stack error
    }

    return;
}

char StackT::Top() {
    if (top > 0) {
        return data[top-1];
    } else {
        // some kind of stack error
    }
}

bool StackT::Size() {
    return size;
}

bool StackT::IsEmtpy() {
    return top == 0;
}

bool StackT::IsFull() {
    return top == MAX_STACK_SIZE;
}