Programmer Think

#include <iostream> using namespace std; void change(int &rnum)//A reference is an alias for a variable name { rnum =111; } //Do not use pointers where references can be used in c + + int main() { int num(10);//Lvalue, memory entity int &rnum(num);//Alias of variable rnum =1;//Alias equal to num cout << num<<end ...

Experimental requirements Title: design a manually set double timer (college entrance examination countdown timer and test preparation time accumulator) to support manual setting of starting time and manual addition and subtraction of time. Basic Requirements Design a date class date. The class body needs to contain data members describing y ...

Source: Code Capriccio Link of force buckle in this question: https://leetcode-cn.com/problems/combination-sum/ 1. Title Description: 2. Idea: The difference between this question and the question of seeking combination is that this question has no quantitative requirements and can be limited to repetition, but it has the ...

We know that there is no gc in C + +. The resources from new/malloc need to be released manually. At this time, some problems will occur. 1 Forget to release, 2 In case of abnormal security, these problems will lead to resource leakage and serious problems. Therefore, our smart pointer appears Why do I need a smart pointer? Memory leak ...

Chinese official documents Official documents in English Step 1: 1 Create and add ons Unreal Engine 4 (UE4). It is recommended to read the programming quick start tutorial first. In this tutorial, it is assumed that you are familiar with creating projects, adding C + + code to them, and configuring input in the Unreal Editor. If you are not f ...

preface: In this note, I annotated most of the code. Some of my ideas and comments were marked in blue, and the key points and areas needing attention were marked in red. In this article, we mainly introduce the usage and application of multimap 1.1 usage of ultimap You need #include < Map > when using The elements in the multimap co ...

Factory design mode 1. Definition Define an interface for creating objects and let subclasses decide which class to instantiate. Factory Method delays the instantiation of a class to subclasses—— Design patterns GoF 2. Code implementation Code background: implement an interface to export data, allowing customers to choose t ...

A. Life of a Flower Title Description Petya has an interesting flower. Petya is a busy man, so she sometimes forgets to water. From the beginning of Petya's life, you have n days. You must determine what happened to his flowers in the end. The flowers grow as follows: If the flower is not watered for two consecutive days, it will die. If th ...

Task analysis Create a function to manage the real address book; Functions include functions 1. Input of data members (members include: name, age, gender, mobile phone number, home address) 2. Query of data members; Query by name 3. Modification of data members; 4. Deletion of data members; Sequence table 5. Modification of data members; ...

☘ preface ☘ Today is the fourth day of the nine day training. I will record the learning contents and problem solutions and strive to be the class representative of 0.0 be careful!!!! The solution 1 of the problem solution is the solution to be mastered today, and the solution 2 is to study again when there is spare power, involving the foll ...