Fwrite
fwrite is a C standard-library function that writes a specified number of fixed-size objects from memory to a stream.
Modern C, Third Edition
fwrite is a C standard-library function that writes a specified number of objects from memory to a stream.
- How it is used
- Writes binary data from memory to streams while preserving byte-oriented file content.
- How deep it goes
- Explains the prototype, byte counts, stream-position updates, short writes, and binary-mode portability, but not implementation internals.
- Examples
- Uses a memory byte array, stdout, file-position navigation, and writing an object’s internal representation.
- What you can do after
- Apply it via the C standard library to write complete binary buffers and detect incomplete transfers.
Modern C
fwrite is the C standard library function that writes a specified number of fixed-size items from memory to a stream.
- How it is used
- Writes binary data to files while preserving each byte's representation.
- How deep it goes
- Explains parameters, byte counts, position updates, binary mode, and short-write errors, but defers broader error-case analysis.
- Examples
- Uses binary files, byte-preserving object storage, and paired fread/fwrite operations as concrete applications.
- What you can do after
- Operate binary-file output, check short writes, and reposition file access with related stream-position functions.
Related concepts
- binary modeconfigured by · Binary mode is a file or stream access mode that processes contents as raw bytes without text encoding, decoding, or translation.
- binary dataused by · Binary data is information represented as sequences of bytes rather than character-oriented text.
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