added print, need testing

include/stack.h

@@ -5,6 +5,7 @@
 #include <expected>
 #include <format>
 #include <new>
+#include <print>
 
 #define DEFAULT_STACK_SIZE 4
 
@@ -71,6 +72,7 @@ StackErr Stack<T>::push(T value) {
 
         delete[] this->data;
         this->data = tmp;
+        this->cap = new_capacity;
     }
 
     this->data[this->len] = value;
@@ -104,6 +106,7 @@ std::expected<T, StackErr> Stack<T>::pop() {
 
         delete[] this->data;
         this->data = tmp;
+        this->cap = new_capacity;
     }
 
     return std::expected(return_val);
@@ -119,4 +122,24 @@ std::expected<T, StackErr> Stack<T>::peek() {
     return std::expected(this->data[this->len - 1]);
 }
 
+template <typename T>
+requires std::formattable<T, char>
+void Stack<T>::print() {
+    std::println("Stack:");
+    std::println("Length: {}.", this->len);
+    std::println("Capacity: {}.", this->cap);
+    
+    std::println("{:^20}", "Datos");
+    std::println("{:^20}", "|");
+    std::println("{:^20}", "v");
+
+    for (int i = 0; i < this->cap; i++) {
+        if (i < this->len) {
+            std::println("{:^20}", this->data[i]);
+        } else {
+            std::println("{:^20}", "NULL");
+        }
+    }
+}
+
 #endif // !ST