std::strerror

 

C++

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スレッドのサポートライブラリ (C++11)

 

ストリングスライブラリ

NULLで終わる文字列 Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

バイト文字列

文字列をマルチバイト

ワイド文字列

クラス Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string

char_traits

 

NULL終端バイト文字列

機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
文字操作 Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
数値形式への変換 Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
atof atoi atol atoll strtol strtoll	strtoul strtoull strtof strtod strtold
文字列操作 Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査 Original: String examination The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
メモリ操作 Original: Memory manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
memchr
memcmp
memset
memcpy
memmove
その他 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strerror

 

Defined in header <cstring>
char* strerror( int errnum );

戻り値のエラーコードのテキストバージョンerrnum。errnum通常errno変数から取得された、しかし、この関数は、型intの任意の値を受け入れます。メッセージはロケール固有.

Original:

Returns text version of the error code errnum. errnum is usually acquired from the errno variable, however the function accepts any value of type int. The message is locale-specific.

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返されたバイト文字列が変更されてはならないさプログラムによって、しかしstrerror関数​​への後続の呼び出しによって上書きされることがあり.

Original:

The returned byte string must not be modified by the program, but may be overwritten by a subsequent call to the strerror function.

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パラメータ

errnum

-

エラーコードを参照する整数値 Original: integral value referring to a error code The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

値を返します

エラーコードに対応するNULL終端バイト文字列へのポインタerrnum.

Original:

Pointer to a null-terminated byte string corresponding to the error code errnum.

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例

#include <iostream>
#include <cmath>
#include <cerrno>
#include <cstring>
 
int main()
{
    double not_a_number = std::log(-1.0);
    if (errno == EDOM) {
        std::cout << "log(-1) failed: " << std::strerror(errno) << '\n';
    }
}

Output:

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

も参照してください

E2BIG, EACCES, ..., EXDEV	標準のPOSIX互換のエラー条件のためのマクロ Original: macros for standard POSIX-compatible error conditions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (マクロ定数)
C documentation for strerror