Vfprintf
vfprintf is a C standard-library function that formats output to a stream using arguments supplied through a va_list.
Modern C, Third Edition
vfprintf is a C standard-library function that formats output to a stream using a va_list of arguments.
- How it is used
- Delegates formatted printing from a variadic wrapper to a C library stream function.
- How deep it goes
- Explains va_list setup and delegation, but stops short of detailing vfprintf’s formatting internals.
- Examples
- Uses a variadic wrapper around a possibly valid thread-local I/O stream and contrasts it with manual va_arg processing.
- What you can do after
- Apply it via the C standard library to implement formatted-output wrappers without manually traversing arguments.
Modern C
vfprintf is the C standard library function that writes formatted output to a stream using a va_list of arguments.
- How it is used
- Delegates formatted output from a variadic wrapper to a selected stream.
- How deep it goes
- Explains va_list forwarding through a complete wrapper, but stops short of vfprintf’s formatting internals.
- Examples
- Uses a printf_debug wrapper that forwards arguments to an optional debug stream.
- What you can do after
- Apply it via the C standard library to forward variadic formatted output without manually processing each argument.
Related concepts
- variadic argumentsused by · A variadic function or parameter accepts a variable number of arguments, often collecting the supplied values into a sequence of a specified type.
- fprintfalternative to · fprintf is a C standard-library function that writes formatted text and converted argument values to a specified stream.
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