名前空間
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std::perror

提供: cppreference.com
< cpp‎ | io‎ | c

 
 
入力/出力ライブラリ
I / Oのマニピュレータ
CスタイルのI / O
バッファ
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(廃止予定)
ストリーム
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Streams
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抽象化
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
ファイルI / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
文字列I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
アレイのI / O
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Array I/O
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istrstream(廃止予定)
ostrstream(廃止予定)
strstream(廃止予定)
タイプ
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Types
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streamoff
streamsize
fpos
エラーカテゴリインターフェース
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
CスタイルのI / O
機能します
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Functions
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ファイルアクセス
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File access
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直接入力/出力
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Direct input/output
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fread
fwrite
書式なし入力/出力
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Unformatted input/output
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書式付き入力/出力
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Formatted input/output
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ファイル位置付け
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File positioning
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ftell
fgetpos
fseek
fsetpos
rewind
エラー処理
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Error handling
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clearerr
feof
ferror
perror
ファイルに対する操作
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Operations on files
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remove
rename
tmpfile
tmpnam
 
Defined in header <cstdio>
void perror( const char *s );
NULLで終わる文字列が現在のシステム変数に格納されているエラーコードを説明する実装定義のエラーメッセージが続く2文字stderr、続いて、(sがNULLポインターである場合を除きます)sが指すの": "内容へのプリントerrnostd::strerror(errno)の出力と同じ)、'\n'続く.
Original:
Prints to stderr the contents of the null-terminated character string pointed to by s (unless s is a null pointer), followed by the two characters ": ", followed by the implementation-defined error message describing the error code currently stored in the system variable errno (identical to the output of std::strerror(errno)), followed by '\n'.
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目次

[編集] パラメータ

s -
説明メッセージがNULLで終わる文字列へのポインタ
Original:
pointer to a null-terminated string with explanatory message
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[編集] 値を返します

(なし)
Original:
(none)
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[編集]

#include <cmath>
#include <cerrno>
#include <cstdio>
 
int main()
{
    double not_a_number = std::log(-1.0);
    if (errno == EDOM) {
        std::perror("log(-1) failed");
    }
}

Output:

log(-1) failed: Numerical argument out of domain

[編集] も参照してください

POSIX準拠のスレッドローカルなエラー番号variable
(マクロ変数)に展開されるマクロ
Original:
macro which expands to POSIX-compatible thread-local error number variable
(マクロ変数)
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[edit]
指定したエラーコードのテキストバージョンを返します
Original:
returns a text version of a given error code
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(関数) [edit]
C documentation for perror