this is so ass tho ngl

.vscode/settings.json

@@ -51,6 +51,10 @@
       "xutility": "cpp",
       "vector": "cpp",
       "list": "cpp",
-        "optional": "cpp"
+      "optional": "cpp",
+      "algorithm": "cpp",
+      "deque": "cpp",
+      "queue": "cpp",
+      "stack": "cpp"
     }
 }

2/linked list by hand.cpp

@@ -12,7 +12,7 @@ public:
 
     node(int data) : data(data), next(nullptr) {}
     node(int data, std::unique_ptr<node> next) : data(data), next(std::move(next)) {}
-    ~node() {}
+    // ~node() {}
 };
 class linked_list
 {
@@ -28,20 +28,14 @@ public:
         }
     }
 
-    linked_list(std::initializer_list<int> v) : head(nullptr)
-    {
-        for (int i : v)
-        {
-            append(i);
-        }
-    }
-
+    linked_list(std::initializer_list<int> v) : linked_list(std::vector<int>(v)) {}
 
     void append(int x) // prepend
     {
         auto temp = std::make_unique<node>(x, std::move(head));
         head = std::move(temp);
     }
+
     /// Pops the head of the linked list and returns the value in x.
     ///
     /// If the linked list is empty, returns false. Otherwise, returns true.
@@ -70,27 +64,27 @@ public:
         }
         return *this;
     }
+
     node *tail() const
     {
         node *temp = head.get();
+        if (!temp) return nullptr;
         while (temp->next != nullptr)
         {
             temp = temp->next.get();
         }
         return temp;
     }
-    linked_list &add(const linked_list &l)
+    // what did i do to my argument
+    void add(const linked_list &l)
     {   
-        std::vector<int> v = l.view();
-        while (v.size() > 0)
-        {
-            append(v.back());
-            v.pop_back();
+        if (!l.head) return;
+        node* l_tail = l.tail(); // valid cuz check above
+        l_tail->next = std::move(head);
+        head = std::make_unique<node>(l.head);
+        // return *this;
     }
-        // delete v?
 
-        return *this;
-    }
     linked_list &add(std::initializer_list<int> l)
     {
         for (int i : l)
@@ -133,7 +127,7 @@ int main(int argc, char const *argv[])
     l.append(4);
     l.append(5);
     std::cout << l << std::endl;
-    int x = l.pop().value();
+    int x = l.pop().value(); // should be 5
     std::cout << x << std::endl;
     linked_list l2 = {6, 7, 8, 9};
     l.add(l2);

3/queue.cpp

@@ -1,5 +1,7 @@
 #include <vector>
 #include <iostream>
+#include <optional>
+
 class queue
 {
 private:
@@ -10,35 +12,47 @@ private:
     int size = 0;
 
 public:
-    int get_size() { return size; }
+    int get_size() const { return size; }
+
     /**
      * Adds an element to the back of the queue.
      *
      * @param x The element to be added.
-     * @return Returns 0 if the element was successfully added, or 1 if the queue is full.
+     * @return Returns true if the element was successfully added, false if the queue is full.
      */
     bool push(int x)
     {
         if (size == cap)
-            return 1;
+            return false; // Queue is full
         arr[back] = x;
         back = (back + 1) % cap;
         size++;
-        return 0;
+        return true;
     }
-    bool pop(int *put)
+
+    /**
+     * Removes an element from the front of the queue.
+     *
+     * @return Returns an optional containing the popped value, or std::nullopt if the queue is empty.
+     */
+    std::optional<int> pop()
     {
         if (size == 0)
-            return 1;
-        *put = arr[front];
+            return std::nullopt; // Queue is empty
+        int value = arr[front];
         front = (front + 1) % cap;
         size--;
-        return 0;
+        return value;
     }
-    std::vector<int> view()
+
+    /**
+     * Returns a vector containing the elements of the queue from front to back.
+     *
+     * @return A vector of integers representing the queue's contents.
+     */
+    std::vector<int> view() const
     {
         std::vector<int> ret;
-        // front to back
         for (int i = 0; i < size; i++)
         {
             ret.push_back(arr[(front + i) % cap]);
@@ -47,7 +61,7 @@ public:
     }
 };
 
-int main(int argc, char const *argv[])
+int main()
 {
     queue q;
     q.push(1);
@@ -70,6 +84,7 @@ int main(int argc, char const *argv[])
     q.push(18);
     q.push(20);
     q.push(20);
+
     std::vector<int> v = q.view();
     for (const int i : v)
     {
@@ -77,7 +92,11 @@ int main(int argc, char const *argv[])
     }
     std::cout << std::endl;
 
-    q.push(21);
+    if (!q.push(21))
+    {
+        std::cout << "Queue is full!" << std::endl;
+    }
+
     v = q.view();
     for (const int i : v)
     {
@@ -85,42 +104,20 @@ int main(int argc, char const *argv[])
     }
     std::cout << std::endl;
 
-    int x;
     for (int i = 0; i < 12; i++)
     {
-        q.pop(&x);
-        std::cout << x << " ";
-    }
-    std::cout << std::endl;
-
-    v = q.view();
-    for (const int i : v)
+        auto popped = q.pop();
+        if (popped.has_value())
         {
-        std::cout << i << " ";
+            std::cout << popped.value() << " ";
+        }
+        else
+        {
+            std::cout << "Queue is empty!" << std::endl;
+        }
     }
     std::cout << std::endl;
 
-    q.push(21);
-    q.push(22);
-    q.push(23);
-    q.push(24);
-    q.push(25);
-    q.push(26);
-    q.push(27);
-    q.push(28);
-    q.push(29);
-    q.push(30);
-    q.push(31);
-    q.push(32);
-    q.push(33);
-    q.push(34);
-    q.push(35);
-    q.push(36);
-    q.push(37);
-    q.push(38);
-    q.push(39);
-    q.push(40);
-
     v = q.view();
     for (const int i : v)
     {

3/stack.cpp

@@ -1,52 +1,87 @@
-#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <optional>
+
 class lda_stack
 {
 private:
-    int stack[60];
-    int top;
+    std::vector<int> stack;
+    size_t capacity;
 
 public:
-    lda_stack(): top(0) {}
+    lda_stack(size_t cap = 60) : capacity(cap) {}
+
+    /**
+     * Pushes an element onto the stack.
+     *
+     * @param x The element to be pushed.
+     * @return Returns true if the element was successfully pushed, false if the stack is full.
+     */
     bool push(int x)
     {
-        if (top >= 60)
-            return 1;
-        stack[top++] = x;
-        return 0;
-    }
-    bool pop(int *put)
-    {
-        if (top == 0)
-            return 1;
-        *put = stack[--top];
-        return 0;
-    }
-    bool peek(int *put)
-    {
-        if (top == 0)
-            return 1;
-        *put = stack[top - 1];
-        return 0;
+        if (stack.size() >= capacity)
+            return false; // Stack is full
+        stack.push_back(x);
+        return true;
     }
 
-    int size() { return top; } // top is the size of the stack, not the index
+    /**
+     * Pops the top element from the stack.
+     *
+     * @return Returns an optional containing the popped value, or std::nullopt if the stack is empty.
+     */
+    std::optional<int> pop()
+    {
+        if (stack.empty())
+            return std::nullopt; // Stack is empty
+        int value = stack.back();
+        stack.pop_back();
+        return value;
+    }
+
+    /**
+     * Peeks at the top element of the stack without removing it.
+     *
+     * @return Returns an optional containing the top value, or std::nullopt if the stack is empty.
+     */
+    std::optional<int> peek() const
+    {
+        if (stack.empty())
+            return std::nullopt; // Stack is empty
+        return stack.back();
+    }
+
+    /**
+     * Returns the current size of the stack.
+     *
+     * @return The number of elements in the stack.
+     */
+    size_t size() const { return stack.size(); }
 };
 
-int main(int argc, char const *argv[])
+int main()
 {
     lda_stack s1;
     s1.push(1);
     s1.push(2);
     s1.push(3);
     s1.push(4);
-    int x;
-    s1.pop(&x);
-    printf("%d\n", x);
-    s1.pop(&x);
-    printf("%d\n", x);
-    s1.pop(&x);
-    printf("%d\n", x);
-    s1.pop(&x);
-    printf("%d\n", x);
+
+    auto popped = s1.pop();
+    if (popped.has_value())
+        std::cout << popped.value() << std::endl;
+
+    popped = s1.pop();
+    if (popped.has_value())
+        std::cout << popped.value() << std::endl;
+
+    popped = s1.pop();
+    if (popped.has_value())
+        std::cout << popped.value() << std::endl;
+
+    popped = s1.pop();
+    if (popped.has_value())
+        std::cout << popped.value() << std::endl;
+
     return 0;
 }