how to delete a pointer in c++mazda skyactiv diesel problems

Can virent/viret mean "green" in an adjectival sense? Answer (1 of 11): Now you understand why pointer bugs are so prevalent. Obtain closed paths using Tikz random decoration on circles. A void pointer is a pointer that has no associated data type with it. A void pointer can hold address of any type and can be typecasted to any type. What REALLY happens when you don't free after malloc before program termination? Posted 28-Dec-15 0:55am CPallini Solution 2 A null pointer indicates that there is "nothing there" - it points at nothing. "delete this" in C++ If the object is created using new, then we can do delete this, otherwise behavior is undefined. Pointers are similar to normal variables in that you don't need to delete them. I've seen quite a few questions over in SO about deleting pointers but they all seem to be related to deleting a class and not a 'simple' pointer (or whatever the proper term might be), here's the code I'm trying to run: Sorry for the long question, wanted to make this as clear as possible, also to reiterate, I have little programming experience, so if someone could answer this using layman's terms, it would be greatly appreciated! let p point to some chars free (p); char *p = (char *) malloc (10 * sizeof (char)); Since freeing p doesn't delete the data stored at the particular memory address I'm facing the problem that for large pointers the newly allocated memory overlaps with the old one what is obviously problematic. I want to just add that the allocated memory WILL be returned for other programs to use, but only AFTER your program has finished executing. Allow non-GPL plugins in a GPL main program. The pointer itself is a local variable allocated on the stack. It may be initialized to zero the first time, but you can't rely on that behavior. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. New operator is used for dynamic memory allocation which puts variables on heap memory. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? delete is used for classes with a destructor since delete will call the destructor in addition to freeing the memory. q still points to the block you got from new, so it's safe to delete it. It has no effect on the pointer pointing to the starting address of that memory location. Deleting Array Objects: We delete an array using [] brackets. The first variable was allocated on the stack. With rare exceptions, C++ programmers should not have to write new or delete ever again. By writing: myPointer = The address of where the data in myVar is stored. then you could write either delete b; or delete c; to free your memory. I believe you're not fully understanding how pointers work. It is also called general purpose pointer. Don't tell someone to read the manual. Appropriate translation of "puer territus pedes nudos aspicit"? Why does the USA not have a constitutional court? You didn't free anything, as the pointer pointed at NULL. The rubber protection cover does not pass through the hole in the rim. Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? There is no way to access that allocated new int anymore, hence memory leak. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. You can call memset to clear the memory returned from malloc. Making statements based on opinion; back them up with references or personal experience. Useful, because the Stack has a limited size and you might want to mess about with a big load of 'ints' without a stack overflow error. C++ Programming Foundation- Self Paced Course, Data Structures & Algorithms- Self Paced Course, Comparison of static keyword in C++ and Java, C++ Program to Show Use of This Keyword in Class, Output of Java Programs | Set 39 (throw keyword), Output of Java Programs | Set 44 (throws keyword). You can access it untill the memory is used for another variable, or otherwise manipulated. Find centralized, trusted content and collaborate around the technologies you use most. Which means Delete operator deallocates memory from heap. On the second example the error is not being triggered but doing a cout of the value of myPointer. You can not do this. email is in use. It's simple, really - for every new, there should be a corresponding delete. You can't assume that memory returned from malloc is initialized to anything. Deleting NULL pointer : Deleting a NULL does not cause any change and no error. C++ allows that you try to delete a pointer that points to null but it doesn't actually do anything, just doesn't give any error. Thank you, I selected your answer for a) explaining what was wrong and b) giving a best practice, thanks much! The more correct term is "with automatic storage duration". Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Deleting array elements in JavaScript - delete vs splice. Step 5 Allocate the memory dynamically at runtime. Deleting variables of User Defined data types: Exceptions:1. The first variable was allocated on the stack. issue, it can be super straightforward to you but I have little to none programming experience. C Program to perform insert & delete operations on queue using pointer. What happens when you delete a pointer in C++? delete will deallocate the memory to which its operand points. Your program attempts to free this memory using delete, which is undefined behavior since you're calling delete for memory that wasn't allocated using new. But this is how it is done: // Allocate a new myClass instance and let x point at that instance myClass* x = new myClass(); // Replace the data pointed at by x to be a new myClass instance *x = myClass(); // At this point, x points at the same piece of memory // but the data stored at that memory is different. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You pointed it at NULL, leaving behind leaked memory (the new int you allocated).You should free the memory you were pointing at. Instead of changing where q points, though, you can copy the value you want into the space that q points to: Here you're changing the value stored in the location to which q points, but you're not changing q itself. You can call delete only on memory you allocated dynamically (on the heap) using the new operator. Deleting a pointer in C++ 1 & 2 myVar = 8; //not dynamically allocated. C++11 comes with several. You are trying to delete a variable allocated on the stack. What is a smart pointer and when should I use one? True. I rarely, if ever, reassign individual heap allocated objects. How do I set, clear, and toggle a single bit? If you're just going to copy a string into it, you don't need to initialize it to zero first; you can just copy the string and (if necessary) append a '\0' to the end. Here is the syntax of delete operator in C++ language, delete pointer_variable; Here is the syntax to delete the block of allocated memory, delete [ ] pointer_variable; What are the differences between a pointer variable and a reference variable? There's no such concept as "deleting" data in C. When you allocate some memory for data, there will always be data there. Your question reveals that you think that freeing up memory is as simple as releasing it when you're done with it. The above did nothing at all. Though that might be considered extraneous and could get optimized out by your compiler. The error says the memory wasn't allocated but 'cout' returned an address. What are the differences between a pointer variable and a reference variable? What is the difference between #include and #include "filename"? Chances are they have and don't get it. {. Why is the federal judiciary of the United States divided into circuits? 3. myPointer = NULL; delete myPointer; In the last line above, r points to the block that was originally pointed to by q and allocated by new, so you can safely delete it. Not the answer you're looking for? Ask genuine questions. 2. Making statements based on opinion; back them up with references or personal experience. Where does the idea of selling dragon parts come from? That's the kind of thinking that creates very buggy C or C++ programs. You can call delete only on memory you allocated dynamically (on the heap) using the new operator. The general form of a pointer variable declaration is type *var-name; Here, type is the pointer's base type; it must be a valid C data type and var-name is the name of the pointer variable. Do you need your, CodeProject, Provide an answer or move on to the next question. Deleting pointer to object in unordered_map. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Effect of coal and natural gas burning on particulate matter pollution. In any case, free on a null pointer does nothing. C++ C++,c++,pointers,delete-operator,forward-list,C++,Pointers,Delete Operator,Forward List, f_ Because first you create the pointer and assign its value to myPointer, second you delete it, third you print it. Deleting a pointer does not destruct a pointer actually, just the memory occupied is given back to the OS. Step 6 Enter an element that to be deleted. The first variable was allocated on the stack. By using our site, you Not stuff that can be found one StackOverflow or even *gasp* Google lol - But here's your troll answer :-P If you meant deallocate a pointer. How does the Chameleon's Arcane/Divine focus interact with magic item crafting? - there is "what is pointed" by the pointer (the memory) Not the answer you're looking for? In general programs only use memset or calloc if they really need the memory buffer to be initialized to zero. Thanks for contributing an answer to Stack Overflow! If the pointer returned by new is assigned to a plain/naked pointer, the object can be leaked. How to solve null pointer exception in steams, list array? Smart pointer will handle memory deallocation itself instead of manual call. is dynamically creating a pointer, and then changing a pointer address to something else still deleting the original allocated space? The delete operator is used to deallocate the memory. In order to hold something new, you call, "On the stack" is an implementation detail -- one that C++ conspicuously avoids mentioning. You must delete the same block of memory that you obtained from new. So it is good practice to set a pointer to NULL (0) after deleting. Step 7 After deletion, the elements are shifted to left by one position. 1980s short story - disease of self absorption. The above did nothing at all. When you have a pointer pointing to some memory there are three different things you must understand: You pointed it at NULL, leaving behind leaked memory (the new int you allocated). q points to statically allocated memory, not something you got from new, so you can't delete it. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The latter is more often referred to as "freeing", while the former is more often called "deleting". The code presented here can be refactored in many different ways; I only focus on the smart pointer cases. If you meant deallocate a pointer, then the command is a keyword. std:: remove_pointer. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Full Stack Development with React & Node JS (Live), Fundamentals of Java Collection Framework, Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, C/C++ Ternary Operator Some Interesting Observations, Pre-increment (or pre-decrement) With Reference to L-value in C++, new and delete Operators in C++ For Dynamic Memory, Pure Virtual Functions and Abstract Classes in C++, Result of comma operator as l-value in C and C++, Increment (Decrement) operators require L-value Expression, Precedence of postfix ++ and prefix ++ in C/C++, Initialize a vector in C++ (7 different ways), Map in C++ Standard Template Library (STL), Set in C++ Standard Template Library (STL). myPointer = new int; //dynamically allocated, can call delete on it. So unless you assign another value to myPointer, the deleted address will remain. The content must be between 30 and 50000 characters. Let's consider a program to delete NULL pointer using the delete operator in C++ programming language. Why does pointer not update on empty BST tree in C when inserting node? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Syntax : delete <variable name> or delete [ ] <array_name>. The behaviour of your program is undefined. Motivation FactSetters have gotten a lot of mileage out of boost::shared_ptr over the years. Trying to delete Non-pointer object. You can however use pointers to allocate a 'block' of memory, for example like this: This will allocate memory space for 20000 integers. Delete doesn't destroy the object. Or consider using calloc, which zeros out the memory before returning the pointer to you. (C++11, 3.7.3). In addition, check out this lecture on stack frames. spelling and grammar. 3. Use smart pointers instead which can handle these things for you with little overhead. - not all pointers need to have their memory deleted: you only need to delete memory that was dynamically allocated (used new operator). 2) Once delete this is done, any member of the deleted object should not be accessed after deletion. Step 3 Input the array elements. You didn't free anything, as the pointer pointed at NULL. : delete ptr; There is no way to access that allocated new int anymore, hence memory leak. To be even more clear, delete doesn't care about what variable it operates on, it only cares about what that variable points to. How could my characters be tricked into thinking they are on Mars? Deleting a pointer does not destruct a pointer actually, just the memory occupied is given back to the OS. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. All memory on the stack is freed automatically at the end of main(): p, d and x (the variable holding the address, not the address it points to) were all allocated on the stack. If you're using C++, do not use raw pointers. class A. The asterisk * used to declare a pointer is the same asterisk used for multiplication. You could replace your data with something like 0s or 0xFFs with memset(), which would overwrite your data. This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL). @tadman . You can only use delete on a pointer to memory that you have allocated using new. Delete can be used by either using Delete operator or Delete [ ] operator New operator is used for dynamic memory allocation which puts variables on heap memory. If you're just going to copy a string into it, you don't need to initialize it to zero first; you can just copy the string and (if necessary) append a '\0' to the end. All Rights Reserved. It may be initialized to zero the first time, but you can't rely on that behavior. CPP. Understand that English isn't everyone's first language so be lenient of bad NULL equals 0, you delete 0, so you delete nothing. Why won't the first case work? Deleting a pointer (or deleting what it points to, alternatively) means, p was allocated prior to that statement like, It may also refer to using other ways of dynamic memory management, like free, which was previously allocated using malloc or calloc. Deleting a NULL pointer does not delete anything. Since freeing p doesn't delete the data stored at the particular memory address I'm facing the problem that for large pointers the newly allocated memory overlaps with the old one what is obviously problematic. Share Follow edited May 23, 2017 at 10:31 Community Bot 1 1 Syntax: // Release memory pointed by pointer-variable delete pointer-variable; Here, the pointer variable is the pointer that points to the data object created by new. Ready to optimize your JavaScript with Rust? Find centralized, trusted content and collaborate around the technologies you use most. In this case, that happens to be memory that's allocated on the stack when the scope of the main() function is entered, and is freed automatically when the scope of main() exits. C++11 comes with several. Pointer to object is not destroyed, value or memory block pointed by pointer is destroyed. You can call delete only on memory you allocated dynamically (on the heap) using the new operator. Asking for help, clarification, or responding to other answers. How is the merkle root verified if the mempools may be different? It points to some data location in storage means points to the address of variables. Question: How do I delete a pointer in C++? Here, Below are examples where we can apply delete operator:1. Ah, I see. rev2022.12.9.43105. Use smart pointers instead which can handle these things for you with little overhead. delete this; char *p = (char *) malloc (10 * sizeof (char)); . Is using ::New() allocating my smart pointer on the heap or the stack? Something can be done or not a fit? Assigning it to. They are removed from memory at the end of a functions execution and/or the end of the program. It is not recommended to use delete with malloc().6. In a nutshell, they do what I described. C++11 comes with several. Find code solutions to questions for lab practicals and assignments. Ready to optimize your JavaScript with Rust? your object that was deleted, it might still work. Pointers to variables on the stack do not need to be deleted. - this memory address Answer: Smart pointer in C++ can be used to delete pointers of object returned by Factory method in C++ in the client code for example in main () method. But it does not set memory before free as requested by OP. It can be used using a Delete operator or Delete [] operator. The pointer returned by new should belong to a resource handle (that can call delete ). @DarkCthulhu Thanks! How to delete the data of a pointer in C? You can call memset to clear the memory returned from malloc. Even if you had allocated memory in. Context: I'm trying to wrap my head around pointers, we just saw them a couple of weeks ago in school and while practicing today I ran into a silly? Online C Queue programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. What does "dereferencing" a pointer mean? Can a prospective pilot be negated their certification because of too big/small hands? Not sure if it was just me or something she sent to the whole team. You're a QPP member,aren't you? Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? No. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The reason you don't see the first example is because it's wrong. The behavior of a program that adds specializations for remove_pointer is undefined. Which means Delete operator deallocates memory from heap. Why should I use a pointer rather than the object itself? Answer (1 of 7): Try [code ]delete **p;[/code] Other posters are correct to suggest that naked delete is a code smell, that using a smart pointer and RAII is better than using naked pointers, and that an object-oriented approach where the pointer is a class member and deleted in the destructor i. Connect and share knowledge within a single location that is structured and easy to search. Whenever you call new, you should then 'delete' at the end of your program, because otherwise you will get a memory leak, and some allocated memory space will never be returned for other programs to use. How to sort an array of pointers by the addresses of what is inside the pointers. Signs are OP is not initializing the memory they allocate, meaning their use of their first. You can do this explicitly using std::list::iterator, but it's easier to simply use a range-based for-loop: 1 2 3 4 for (Object* obj : objList) { obj->PrintValue (); } Last edited on May 10, 2021 at 5:39am May 10, 2021 at 5:57am seeplus (5744) Hmm okay, I'm not sure what smart pointers are, but I'll look into it, thanks! When would I give a checkpoint to my D&D party that they can return to if they die? Good luck with that. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Examples: Do you need to delete pointers C++? What is the difference between const int*, const int * const, and int const *? Seems the most straightforward use to use and delete a pointer? Step 4 Declare a pointer variable. the pointer, it was simply still a valid object. With arrays, why is it the case that a[5] == 5[a]? Maybe that pointe. Is there any reason on passenger airliners not to have a physical lock between throttles? Really? 2. Just use the stack 1. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. For deleteing the pointer you need to use . Received a 'behavior reminder' from manager. Did neanderthals need vitamin C from the diet? You can't assume that memory returned from malloc is initialized to anything. rev2022.12.9.43105. How many transistors at minimum do you need to build a general-purpose computer? That brings up the second point--if the pointer goes out of scope before you deallocate the object you allocated on the heap, you will never be able to deallocate it, and will have a memory leak. This You probably missed something hereCan you delete nothing? How to Declare a Pointer to a Pointer in C? Recommended to read this post before moving forward: How to write Smart Pointer for a given class in C++? i have code like this: int **ptr; ptr = new char * [2]; ptr [0] = new int (5); ptr [1] = new int (16); i know we can delete ptr like this: for (int i = 0; i <2; i++) delete ptr [i]; delete ptr; But can i delete like this? myPointer = new int; delete myPointer; //freed memory myPointer = NULL; //pointed dangling ptr to NULL The better way: If you're using C++, do not use raw pointers. How can I delete the data to which a pointer points to ? New operator is used for dynamic memory allocation which puts variables on heap memory while delete operator deallocates memory from heap. 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Syntax: data_type_of_pointer **name_of_variable = & normal_pointer_variable; Example: So the address that cout prints is the address of the memory location of myVar, or the value assigned to myPointer in this case. Something went wrong. (Opencv and C++), What Does the Standard Say About How Calling Clear on a Vector Changes the Capacity, How to Stop Name-Mangling of My Dll's Exported Function, Who Deletes the Memory Allocated During a "New" Operation Which Has Exception in Constructor, How to Redefine a C++ MACro Then Define It Back, Is Storing an Invalid Pointer Automatically Undefined Behavior, Template Deduction for Function Based on Its Return Type, How to Avoid the Diamond of Death When Using Multiple Inheritance, About Us | Contact Us | Privacy Policy | Free Tutorials. You should free the memory you were pointing at. In general programs only use memset or calloc if they really need the memory buffer to be initialized to zero. How many transistors at minimum do you need to build a general-purpose computer? You can access it untill the memory is used for another variable, or otherwise manipulated. So you can't delete or free it, because you didn't assign it. Don't attempt to derefererence either b or c after the delete call though, the behaviour on doing that is also undefined. Deleting pointer with or without value, 5. deleting memory dynamically allocated by malloc. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You must do so /before/ free()ing it. public: void fun () {. 2022 ITCodar.com. If you see the "cross", you're on the right track, What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked, QGIS expression not working in categorized symbology. If you're using C++, do not use raw pointers. I think you're relying on a technicality here. If you had written. Connect and share knowledge within a single location that is structured and easy to search. What was your intent in making that statement, if not to answer the OP's question? It is not safe to delete a void pointer in C/C++ because delete needs to call the destructor of whatever object it's destroying, and it is . A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? 2 Answers Sorted by: 3 You are already deallocating what you have allocated but doublePtrNode [i]->value=i; assumes that you've allocated a Node there, but you haven't so the program has undefined behavior. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. C++ after delete pointer int* ptr = new int(6); reserves some memory where ptr will be pointing to, that memory will be good to store one int , 6 or any other, it cannot be used to do anything else, you can reliably store the data there and access it later. So it is good practice to set a pointer to NULL (0) after deleting. Delete is an operator that is used to destroy array and non-array(pointer) objects which are created by new expression. Seems to work to me, the pointer is no longer storing an address, is this the proper way to delete a pointer? Program3.cpp #include <iostream> using namespace std; int main () { // initialize the integer pointer as NULL int *ptr = NULL; // delete the ptr variable delete ptr; cout << " The NULL pointer is deleted."; return 0; } Output Why Smart pointers can not be declared the usual Pointer way, c++ Deleting multiple head/tail of linked list stored in vector. How could my characters be tricked into thinking they are on Mars? Does integrating PDOS give total charge of a system? Solution 1 You cannot 'delete' a null pointer. Why is this usage of "I've to work" so awkward? You are not allocating a 2D array - you are making n+1 separate allocations, completely unrelated to each other as far as the compiler can tell. return 0; } Seeing as how no memory was allocated after that, and you didn't erase. As we saw in the article about removing elements from a sequence container, to remove elements in a vector based on a predicate, C++ uses the erase-remove idiom: vector<int> vec {2, 3, 5, 2}; vec.erase (std::remove_if (vec.begin (), vec.end (), [] (int i) { return i % 2 == 0;}), vec.end ()); Which we can wrap in a more expressive function call: Trying to delete pointer to a local stack allocated variable. Your first code snippet does indeed delete the object. Asking for help, clarification, or responding to other answers. It returns an address that points to a memory location that has been deleted. +1 (416) 849-8900. Only. C++ deleting a pointer itself instead of deleting the pointed-to-data, pointer being freed was not allocated for pointer assignment. You are calling new n+1 times, so you should call delete n+1 times, or else you leak memory. Delete is an operator that is used to destroy array and non-array (pointer) objects which are created by new expression. Delete is an operator in C++ that can be used to free up the memory blocks that has been allocated using the new operator. various way to delete pointer to pointer morz i just search for a while in c++ groups but cannot find good answer. How did muzzle-loaded rifled artillery solve the problems of the hand-held rifle? Pointer to object is not destroyed, value or memory block pointed by pointer is destroyed/deallocated. Does the collective noun "parliament of owls" originate in "parliament of fowls"? If a question is poorly phrased then either ask for clarification, ignore it, or. new is never called. Void pointer is a pointer which is not associate with any data types. If the object is created using new, then we can do delete this, otherwise behavior is undefined. Strictly speaking, the C programming language has no delete (it is a C++ keyword), it just provides the free [ ^] function. Provides the member typedef type which is the type pointed to by T, or, if T is not a pointer, then type is the same as T . delete pointer; does not delete the pointer itself, but the data that the pointer is pointing to. Did the apostolic or early church fathers acknowledge Papal infallibility? User has privilege to deallocate the created pointer variable by this delete operator. 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 Regardless, no clarification is necessary here, it's obvious why OP is observing this behavior. To do this: There is a rule in C++, for every new there is a delete. Step 2 Declare and read the array size at runtime. 1) delete operator works only for objects allocated using operator new (See this post ). And it's logic that it prints 0 because you did: Thanks for contributing an answer to Stack Overflow! free (and malloc, calloc etc) is used for basic types, but in C++ new and delete can be used for them likewise, so there isn't much reason to use malloc in C++, except for compatibility reasons. @EricPostpischil but if there is old data and I put in a new char at the first position and then iterate until '\0', this will give me not the desired result, since the old data interferes with the new Glib answers before a question has been clarified risk overlooking the real problem. In C++, the delete operator should only be used either for the pointers pointing to the memory allocated using new operator or for a NULL pointer, and free () should only be used either for the pointers pointing to the memory allocated using malloc () or for a NULL pointer. I don't understand why you're accusing me of posting a "glib" answer when your own answer, posted before mine, was "put new data there." Or consider using calloc, which zeros out the memory before returning the pointer to you. Use smart pointers instead which can handle these things for you with little overhead. It destroys the memory block or the value pointed by the pointer. It will probably start as garbage until you put your data there, and your data will stay there until you put something else there. delete operator Since it is the programmer's responsibility to deallocate dynamically allocated memory, programmers are provided delete operator in C++ language. Advantages of void pointers: 1) malloc () and calloc () return void * type and this allows these functions to be used to allocate memory of any data type (just because of . To learn more, see our tips on writing great answers. Differences in delete and free are: void pointer in C / C++. What is a smart pointer and when should I use one? Declaring Pointer to Pointer is similar to declaring a pointer in C. The difference is we have to place an additional '*' before the name of the pointer. Thanks, THIS was super helpful, I thought I HAD to delete all pointers, didn't know that was only for the ones that were new'd, thanks. Does #3 really work? A null pointer indicates that there is "nothing there" - it points at nothing. To learn more, see our tips on writing great answers. If you are going to use raw owning pointers, you could fix it like this: Can't call delete on it. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Step 1 Declare and read the number of elements. Why should I use a pointer rather than the object itself? In your case, you should simply remove the delete. It will be deallocated as soon as it goes out of scope. Designed by Colorlib. (I literally) learn something, @AmelSalibasic The memory associated with the variable on the stack will be freed only once it goes out of scope. Is there a verb meaning depthify (getting more depth)? deleting indiviual pointers from an array. delete pearl; pearl->eat (); //Works! Although above program runs fine on GCC. 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