C library:<cctype>(ctype.h) 1,isalnum(): check whether c is either a decimal digit or an uppercase or lowercase letter. 2, isalpha 3, isblank(c++11) 4, iscntrl : check whether c is a control character(参考http://www.cplusplus.com/reference/cctype/iscntrl/) 5, isdigit 6, isgraph:可...
英文原文:http://www.cplusplus.com/reference/clibrary/cctype/ cctype (ctype.h) 字符处理函数 这个头文件声明了一系列用来分类和转换单个字符的函数。 所有这些函数都把参数(单个字符)视为与之等值的整数,并且返回一个整数。该返回值可能是另外一个字符,也可能是一个代表布尔值的值(0表示 false,而另外一个不...
Includes the Standard C library header <ctype.h> and adds the associated names to the std namespace.RequirementsHeader: <cctype>Namespace: stdRemarksIncluding this header ensures that the names declared using external linkage in the Standard C library header are declared in the std namespace....
Includes the Standard C library header <ctype.h> and adds the associated names to thestdnamespace. #include <cctype> Remarks Including this header ensures that the names declared using external linkage in the Standard C library header are declared in thestdnamespace. ...
原文:http://www.cplusplus.com/reference/clibrary/cctype/isgraph/ int isgraph ( int c ); 检查一个字符是否是可显示字符。 检查参数c是否是一个可显示字符。可显示字符包括那些可以打印出来(由isprint返回值决定),不被认为是可显示字符的空格符(例如 ' ')除外。
Note: The Standard C++ library works in conjunction with the headers from the Standard C library. For information about the Standard C library, refer to the documentation that is supplied with the operating system.Copyright note Certain materials included or referred to in this document are ...
包含標準 C 連結庫標頭 <ctype.h> ,並將相關聯的名稱新增至 std 命名空間。需求Header:<cctype>命名空間:std備註包含此標頭可保證,透過使用 Standard C 程式庫標頭中的外部連結所宣告的名稱會在 std 命名空間中宣告。函式C++ 複製 int isalnum(int c); int isalpha(int c); int isblank(int c); int ...
包含标准 C 库标头 <ctype.h> 并将关联名称添加到 std 命名空间。要求标头:<cctype>命名空间: std备注包含该标头还将确保使用标准 C 库标头中的外部链接声明的名称在 std 命名空间中声明。函数C++ 复制 int isalnum(int c); int isalpha(int c); int isblank(int c); int iscntrl(int c); int ...
Standard library header<cctype> This header was originally in the C standard library as<ctype.h>. This header is part of thenull-terminated byte stringslibrary. Functions isalnum checks if a character is alphanumeric (function) isalpha checks if a character is alphabetic ...
The output of the above code will be: ff123YZ contains 5 hexadecimal digits. ❮ C++ <cctype> Library