std::strerror

 

C++

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字符串库

null结尾的字符串 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.

字节的字符串

多字节字符串

宽字符串

类 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结尾的字节串

功能 Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
字符操作 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
转换为数字格式 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
字符串操作 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
字符串检查 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
内存操作 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
杂项 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 );

返回的错误代码的文本版本errnum。errnum的收购errno变量，函数接受任何int类型的值。该消息是特定于语言环境的.

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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。返回的字节字符串不能被修改通过该程序，但可能会被覆盖的后续调用strerror功能

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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。参数。

errnum

-

。积分值指的是一个错误代码。 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.

===。 返回值。===

。指针指向一个空终止字节的字符串对应的错误代码errnum.

Original:

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

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。为例。

#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

。另请参阅。

E2BIG, EACCES, ..., EXDEV	宏为标准的POSIX兼容的错误条件 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. （宏不变）
C documentation for strerror