I found that we can access to items within a pointer vector by two ways bellow: The first way is using at function, and the other one is using indexer The output result is: 123 456 Happy Coding!!
I did a benchmark to compare performance between insert and push_back functions of vector on 100.000 int elements in C++ The result is: push_back: 240ms insert: 10ms Here is my code: So, if you want to perform copy items between vectors, you should use insert instead of push_back.
Let's consider two follow scenarios: Happy learning!!
Cay S. Horstmann Department of Computer Science San Jose State University San Jose, CA 95192-0249 cay\x40horstmann.com Copyright (C) Cay S. Horstmann 1997 What is a pitfall? C++ code that compiles links runs does something different than you expect Example: if (-0.5 <= x <= 0.5) return 0; Pitfall: if (-0.5 <= x <= 0.5) return… Continue reading C++ Pitfalls
Without some code of where things are crashing, we can only speculate. There are a million things that could be going wrong, such as Deleting memory twice (especially likely if you copy pointers around) Deleting a pointer that was never initialized Deleting a pointer that was assigned to garbage Deleting a pointer to memory that… Continue reading C++ Tutorial – Almost error cases that you got when try to delete a pointer
Almost C++ programmer want to manage all object they created. But when they use gcnew in C++/CLI to create objects, it seems they were not able to control these objects and that makes them feel uncomfortable. We can only set these object to nullptr and cannot delete it by calling delete, this is responsibility of GC. We… Continue reading C++/CLI Tutorial – How to monitor managed object in C++ program
This tip will show you the simple way to pass a pointer by reference to a function. It's very simple. The result is: Handle is NULL Happy coding!!