std::wcstol, std::wcstoll
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在头文件 <cwchar> 中定义
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long wcstol( const wchar_t* str, wchar_t** str_end, int base ); |
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long long wcstoll( const wchar_t* str, wchar_t** str_end, int base ); |
(C++11 起) | |
。解释一个整数值,宽字符串所指向的
str
.原文:
Interprets an integer value in a wide string pointed to by
str
.Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid base-n (where n=base) integer number representation and converts them to an integer value. The valid integer value consists of the following parts:
- (可选) plus or minus sign
- (可选) prefix (
0
) indicating octal base (applies only when the base is 8) - (可选) prefix (
0x
or0X
) indicating hexadecimal base (applies only when the base is 16) - a sequence of digits
The set of valid digits for base-2 integer is 01
, for base-3 integer is 012
, and so on. For bases larger than 10
, valid digits include alphabetic characters, starting from Aa
for base-11 integer, to Zz
for base-36 integer. The case of the characters is ignored.
。的功能设置的指针所指向的
str_end
指向过去宽字符的最后一个字符解释。 str_end
是NULL,被忽视。原文:
The functions sets the pointer pointed to by
str_end
to point to the wide character past the last character interpreted. If str_end
is NULL, it is ignored.[编辑] 。参数。
str | - | 。 null结尾的宽字符串的指针进行解释。
原文: pointer to the null-terminated wide string to be interpreted |
str_end | - | 。为宽字符的指针的指针。
原文: pointer to a pointer to wide character |
base | - | 。 “基地”的解释的整数值。
原文: base of the interpreted integer value |
===。 返回值。===
。整型值对应的内容
str
成功。如果转换的值落在相应的返回类型的范围,范围发生错误和LONG_MAX,LONG_MIN,LLONG_MAX或LLONG_MIN返回。如果没有可以进行转换,0返回.原文:
Integer value corresponding to the contents of
str
on success. If the converted value falls out of range of corresponding return type, range error occurs and LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN is returned. If no conversion can be performed, 0 is returned.[编辑] 。为例。
本章尚未完成 原因:暂无示例 |
[编辑] 。另请参阅。
宽字符串转换为无符号整数的值 原文: converts a wide string to an unsigned integer value (函数) | |
C documentation for wcstol, wcstoll
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