


本篇文章,小编将和大家分享一个有意思的C++笔试题,要求实现简单错误记录的功能,感兴趣的朋友可以了解一下,希望能对你的C++开发学习有所帮助。
题目介绍:
开发一个简单错误记录功能小模块,能够记录出错的代码所在的文件名称和行号。 要求:
1.记录最多8条错误记录,对相同的错误记录(即文件名称和行号完全匹配)只记录一条,错误计数增加;(文件所在的目录不同,文件名和行号相同也要合并);
2.超过16个字符的文件名称,只记录文件的最后有效16个字符;(如果文件名不同,而只是文件名的后16个字符和行号相同,也不要合并);
3.输入的文件可能带路径,记录文件名称(只记录文件名)不能带路径 。
例:
输入:
E:\\linuas\\desktop\\demo.txt 1234
E:\\linuas\\desktop\\demo.doc 1234
E:\\linuas\\desktop\\demo.txt 1234
输出:
demo.txt 1234 2
demo.doc 1234 1
分析:
解决方案里用到了pair(包含两种格式的数据结构)、make_pair(构造pair)、vector(栈)、find(找到字符串中指定字符位置)、erase(删除部分字符串)、substr(截取字符串)等用法,值得记录一下,免得后期学习忘记。解决方案高效而使用,不可多得。
#include <iostream> #include <vector> #include <string> #include <algorithm> using namespace std; bool compare(pair<string, int> a, pair<string, int> b) { return a.second > b.second; } int main(void) { string input, file; vector<pair<string, int>> errors; while (getline(cin, input)) { if (input.size() == 0) break; unsigned int f = input.rfind('\\'); file = input.substr(f + 1); errors.push_back(make_pair(file, 1)); for (int i = 0; i<(errors.size() - 1); i++) { if (errors[i].first == file) { errors[i].second++; errors.pop_back(); break; } } } stable_sort(errors.begin(), errors.end(), compare); int idx = 0; while (idx<8 && idx<errors.size()) { string check = errors[idx].first; int t = check.find(' '); if (t>16) errors[idx].first.erase(0, t - 16); cout << errors[idx].first << ' ' << errors[idx].second << endl; idx++; } }
结果:
相关教程:C++视频教程
The above is the detailed content of C++ written test questions to implement simple error recording function. For more information, please follow other related articles on the PHP Chinese website!

C# is a programming language, while .NET is a software framework. 1.C# is developed by Microsoft and is suitable for multi-platform development. 2..NET provides class libraries and runtime environments, and supports multilingual. The two work together to build modern applications.

C#.NET is a powerful development platform that combines the advantages of the C# language and .NET framework. 1) It is widely used in enterprise applications, web development, game development and mobile application development. 2) C# code is compiled into an intermediate language and is executed by the .NET runtime environment, supporting garbage collection, type safety and LINQ queries. 3) Examples of usage include basic console output and advanced LINQ queries. 4) Common errors such as empty references and type conversion errors can be solved through debuggers and logging. 5) Performance optimization suggestions include asynchronous programming and optimization of LINQ queries. 6) Despite the competition, C#.NET maintains its important position through continuous innovation.

The future trends of C#.NET are mainly focused on three aspects: cloud computing, microservices, AI and machine learning integration, and cross-platform development. 1) Cloud computing and microservices: C#.NET optimizes cloud environment performance through the Azure platform and supports the construction of an efficient microservice architecture. 2) Integration of AI and machine learning: With the help of the ML.NET library, C# developers can embed machine learning models in their applications to promote the development of intelligent applications. 3) Cross-platform development: Through .NETCore and .NET5, C# applications can run on Windows, Linux and macOS, expanding the deployment scope.

The latest developments and best practices in C#.NET development include: 1. Asynchronous programming improves application responsiveness, and simplifies non-blocking code using async and await keywords; 2. LINQ provides powerful query functions, efficiently manipulating data through delayed execution and expression trees; 3. Performance optimization suggestions include using asynchronous programming, optimizing LINQ queries, rationally managing memory, improving code readability and maintenance, and writing unit tests.

How to build applications using .NET? Building applications using .NET can be achieved through the following steps: 1) Understand the basics of .NET, including C# language and cross-platform development support; 2) Learn core concepts such as components and working principles of the .NET ecosystem; 3) Master basic and advanced usage, from simple console applications to complex WebAPIs and database operations; 4) Be familiar with common errors and debugging techniques, such as configuration and database connection issues; 5) Application performance optimization and best practices, such as asynchronous programming and caching.

C# is widely used in enterprise-level applications, game development, mobile applications and web development. 1) In enterprise-level applications, C# is often used for ASP.NETCore to develop WebAPI. 2) In game development, C# is combined with the Unity engine to realize role control and other functions. 3) C# supports polymorphism and asynchronous programming to improve code flexibility and application performance.

C# and .NET are suitable for web, desktop and mobile development. 1) In web development, ASP.NETCore supports cross-platform development. 2) Desktop development uses WPF and WinForms, which are suitable for different needs. 3) Mobile development realizes cross-platform applications through Xamarin.

The C#.NET ecosystem provides rich frameworks and libraries to help developers build applications efficiently. 1.ASP.NETCore is used to build high-performance web applications, 2.EntityFrameworkCore is used for database operations. By understanding the use and best practices of these tools, developers can improve the quality and performance of their applications.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

Dreamweaver Mac version
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
