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Questions and Answers
To perform file processing in C++, the header files essential are __________ and __________.
fstream, ios
The __________ is the base class for all the classes that provide input/output operations.
ios
The namespace __________ is used to provide classes and functions for working with files, directories, and paths.
fs
The function __________ is used to create a directory in C++.
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The function __________ is used to check the existence of a file in C++.
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The __________ is used to iterate over directories in C++.
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The header file __________ is included to perform file processing in C++.
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The __________ is used to specify the path of a file in C++.
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Study Notes
C++ Files and Streams
- The C++ header files
iostreamandfilesystemare essential for file processing, providing classes and functions for working with files, directories, and paths in a platform-independent manner.
File Organization and Manipulation
- The
iosclass is the base class for all file processing classes. - The
filesystemnamespace provides several member functions for performing input/output operations.
Creating Directories
- To create a directory, use the
fs::create_directory()function, specifying the directory path as an argument, e.g.,fs::create_directory("…/FileOrganization/").
Checking File Existence
- To check if a file exists, use the
fs::exists()function, passing the file path as an argument, e.g.,fs::path filepath="…/FileOrganization/mina.txt"; if(fs::exists(filepath)){ ………….}.
Iterating over Directories
- To iterate over directories, use the
fs::directory_iterator()function, passing the directory path as an argument, e.g.,fs::path dirpath="…/FileOrganization/"; for(const auto& entry : fs::directory_iterator(dirpath)) { std::cout …… }.
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Description
This quiz covers C++ files and streams, including reading and writing sequential and random access files, and I/O formatting. Prepared by Dr. Mina Younan for IS211.
