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C + + cast operator appendix Encyclopedia of professional vocabulary C languageC++PointerCast type reference Statement: some of the contents of this article are directly from references and are subject to infringement and deletion. C + + cast operators (static_cast, reinterpret_cast, const_cast and dynamic_cast) summary In my daily ...

This problem needs to implement a circular queue, so before that, we need to know the concept and structure of queue Queue: a special linear table that can only be inserted at one end and deleted at the other end. It has the characteristics of first in first out, then in and then out Delete one end of the queue Enter the queue: the end of t ...

1, Overview of classes Handle (spatial pointer) Object (storage space) Transaction t1, t2;//Declare handle t1, t2 t1 = new();//Instantiate the object and assign its handle to t1 t2 = t1;//Assign the value of t1 to t2, that is, t1 and t2 point to the same object t1 = new();//Instantiate the second object and give its handle to t1 //At thi ...

Use ros1 under ros2_ Bridge and ros1 custom message bridge Sample environment Operating system: ubuntu 20.04 amd64 ros version: noetic ros2 version: foxy ros1 sample code Create workspace catkin for ros1_ WS, function pack custom_msgs and create an MSG file testnoetic msg TestNoetic. The contents of the MSG file are as follows: string te ...

Classes and object orientation (1) theory Relationship between class and object: 1. Object oriented is a programming idea 2. Class is a kind of grammar 3. Grammar is the basis of realizing programming ideas class Definition: a collection of objects with the same attributes (data members) and behaviors (functions), such as: Human beings are ...

Double ended queue deque deque is a double ended queue, which can be inserted at the head and tail, or deleted at the head and tail. Its advantage is that it combines the advantages of vector and list, but realizes random access and header plug deletion. When the space is not enough and needs to be expanded, it does not need to be as compl ...

Title Description Title address: P1896 [SCOI2005] mutual non aggression In N × There are K kings in N's chessboard so that they don't attack each other. How many placement schemes are there. The king can attack one grid in its upper, lower, left, lower, left, lower, right, upper, right and lower eight directions, a total of 8 grids. I ...

C Gym - 102822D analysis: The answer is monotonous and can be divided into two points. Then the focus is on the writing of the judgment function. Let's assume that the answer is X. because this question needs to reduce the bomb by - 1 before it explodes, it's very awkward. Let's first consider the case that the bomb explodes when it reaches 0. ...

In recent days, I began to reuse vscode as the default editor (Python, cpp). After setting it as the default to open the software, I found that the icon of the program file in the windows file manager has become the icon of vscode itself, which does not distinguish the file type, which is inconvenient. Modification effect: Manually modi ...

C + + container Basic Usage Gets the length of the container Before, we often used sizeof() to obtain the length of the array: int data[17]; size_t data_size = sizeof(data)/sizeof(data[0]); printf("Size of array: %zu",data_size); However, using the size() method of the container can obtain the data length more conveniently: std::arr ...