# std::vprint_nonunicode

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< cpp‎ | io

Defined in header `<print>` |  |
void vprint_nonunicode( std::FILE* stream, std::string_view fmt, std::format_args args ); | (1) | (since C++23)
void vprint_nonunicode( std::string_view fmt, std::format_args args ); | (2) | (since C++23)

Format `args` according to the format string `fmt`, and writes the result to the stream.

1) Writes the result of std::vformat(fmt, args) to the stream. The behavior is undefined if stream is not a valid pointer to a C stream.
2) same as (1) when stream is equal to the standard C output stream stdout, i.e.

    std::vprint_nonunicode(stdout, fmt, args);

### Parameters

stream | - | output file stream to write to
fmt | - | an object that represents the format string. The format string consists of ordinary characters (except { and }), which are copied unchanged to the output, escape sequences {{ and }}, which are replaced with { and } respectively in the output, and replacement fields. Each replacement field has the following format:
`{` arg-id (optional) `}` | (1) |
`{` arg-id (optional) `:` format-spec `}` | (2) |
1) replacement field without a format specification 2) replacement field with a format specification
arg-id | - | specifies the index of the argument in `args` whose value is to be used for formatting; if it is omitted, the arguments are used in order. The arg-ids in a format string must all be present or all be omitted. Mixing manual and automatic indexing is an error.
format-spec | - | the format specification defined by the std::formatter specialization for the corresponding argument.
For basic types and standard string types, the format specification is interpreted as standard format specification. For chrono types, the format specification is interpreted as chrono format specification. For std::thread::id, the format specification is interpreted as thread id format specification. For other formattable types, the format specification is determined by user-defined `formatter` specializations.
args | - | arguments to be formatted

### Return value

(none)

### Exceptions

- std::bad_alloc on allocation failure.
- std::system_error, if writing to the stream fails.
- Propagates any exception thrown by used formatters, e.g. std::format_error.

### Notes

Feature-test macro | Value | Std | Comment
--- | --- | --- | ---
`__cpp_lib_print` | 202207L | (C++23) | Formatted output
`__cpp_lib_format` | 202207L | (C++23) | Exposing std::basic_format_string

### Example

| This section is incomplete Reason: no example

### See also

vprint_unicode (C++23) | prints to Unicode capable stdout or a file stream using type-erased argument representation (function)
vprint_nonunicode(std::ostream) (C++23) | outputs character data using type-erased argument representation (function)
print (C++23) | prints to stdout or a file stream using formatted representation of the arguments (function template)
format (C++20) | stores formatted representation of the arguments in a new string (function template)

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