How to open a file using C++?

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When opening the software or game, a prompt suddenly appears that "the application cannot start normally (0xc0000906)" appears, and many users will be confused and don't know where to start. In fact, most of these errors are caused by corruption of system files or missing runtime libraries. Don't rush to reinstall the system. This article provides you with several simple and effective solutions to help you quickly restore the program to run. 1. What is the error of 0xc0000906? Error code 0xc0000906 is a common startup exception in Windows systems, which usually means that the program cannot load the necessary system components or running environment when running. This problem often occurs when running large software or games. The main reasons may include: the necessary runtime library is not installed or damaged. The software installation package is endless

To use regular expressions in C, you need to include header files and use the functions it provides for pattern matching and text processing. 1. Use std::regex_match to match the full string, and return true only when the entire string conforms to the pattern; 2. Use std::regex_search to find matches at any position in the string; 3. Use std::smatch to extract the capture group, obtain the complete match through matches[0], matches[1] and subsequent sub-matches; 4. Use std::regex_replace to replace the matching text, and support the capture group with references such as $1 and $2; 5. You can add an iset when constructing the regex (

The computer prompts "MsVCP71.dll is missing from the computer", which is usually because the system lacks critical running components, which causes the software to not load normally. This article will deeply analyze the functions of the file and the root cause of the error, and provide three efficient solutions to help you quickly restore the program to run. 1. What is MSVCP71.dll? MSVCP71.dll belongs to the core runtime library file of Microsoft VisualC 2003 and belongs to the dynamic link library (DLL) type. It is mainly used to support programs written in C to call standard functions, STL templates and basic data processing modules. Many applications and classic games developed in the early 2000s rely on this file to run. Once the file is missing or corrupted,

Use the seekg and tellg methods of std::ifstream to obtain file size across platforms. By opening a binary file and positioning it to the end, use tellg() to return the number of bytes; 2. It is recommended to use std::filesystem::file_size for C 17 and above. The code is concise and errors are handled through exceptions. The C 17 standard must be enabled; 3. On POSIX systems, the stat() function can be used to efficiently obtain file size, which is suitable for performance-sensitive scenarios. The appropriate method should be selected based on the compiler and platform, and std::filesystem should be used first (if available), otherwise use ifstream to ensure compatibility, or use st on Unix systems

Operator overloading in C allows new behaviors of standard operators to be assigned to custom types, 1. Return new objects through member function overloading; 2. Overload = Modify the current object and return reference; 3. Friend function overloading

AbasicMakefileautomatesC compilationbydefiningruleswithtargets,dependencies,andcommands.2.KeycomponentsincludevariableslikeCXX,CXXFLAGS,TARGET,SRCS,andOBJStosimplifyconfiguration.3.Apatternrule(%.o:%.cpp)compilessourcefilesintoobjectfilesusing$

std::variant is a type-safe union introduced by C 17. It can safely hold the value of one of the specified types. It can realize secure access and type checking through methods such as std::get, std::holds_alternative, std::visit and std::get_if. Combined with std::monostate, optional values can be simulated. It is recommended to use std::visit for type distribution and avoid large type lists to improve maintainability, and ultimately ensure type safety and exception safety.