[ Web Proxy ]
URL:
Viewing: https://ru.cppreference.com/cpp/string/byte/isprint [Back]  [Original]

std::isprint cppreference.com
cppreference.com

std::isprint

cppreference.com
<tbody> </tbody>
int isprint( int ch );

, ch , C. "C" :

  • (0123456789)
  • (ABCDEFGHIJKLMNOPQRSTUVWXYZ)
  • (abcdefghijklmnopqrstuvwxyz)
  • (!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~)
  • ( )

, ch unsigned char EOF.

ch

, , .

<cctype>, std::isprint , unsigned char EOF. char ( signed char), unsigned char:

bool my_isprint(char ch)
{
    return std::isprint(static_cast<unsigned char>(ch));
}

, , char signed char. unsigned char:

int count_prints(const std::string& s)
{
    return std::count_if(s.begin(), s.end(), 
                      // static_cast<int(*)(int)>(std::isprint)         // 
                      // [](int c){ return std::isprint(c); }           // 
                      // [](char c){ return std::isprint(c); }          // 
                         [](unsigned char c){ return std::isprint(c); } // 
                        );
}

#include <cctype>
#include <clocale>
#include <iostream>
 
int main()
{
    unsigned char c = '\xa0'; //    ISO-8859-1
 
    std::cout << "isprint(\'\\xa0\',  C  )  "
              << std::boolalpha << (bool)std::isprint(c) << '\n';
 
    std::setlocale(LC_ALL, "en_GB.iso88591");
    std::cout << "isprint(\'\\xa0\',  ISO-8859-1)  "
              << std::boolalpha << (bool)std::isprint(c) << '\n';
}

:

isprint('\xa0',  C  )  false
isprint('\xa0',  ISO-8859-1)  true

,
( ) []
,
() []
C isprint
ASCII

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

- -- -
08 \x0\x8 \0\10 (NUL, ..) 0 0 0 0 0 0 0 0 0 0 0 0
9 \x9 \11 (\t) 0 0 0 0 0 0 0 0 0 0 0 0
1013 \xA\xD \12\15 (\n, \v, \f, \r) 0 0 0 0 0 0 0 0 0 0 0 0
1431 \xE\x1F \16\37 0 0 0 0 0 0 0 0 0 0 0 0
32 \x20 \40 0 0 0 0 0 0 0 0 0 0 0 0
3347 \x21\x2F \41\57 !"#$%&'()*+,-./ 0 0 0 0 0 0 0 0 0 0 0 0
4857 \x30\x39 \60\71 0123456789 0 0 0 0 0 0 0 0 0 0 0 0
5864 \x3A\x40 \72\100 :;<=>?@ 0 0 0 0 0 0 0 0 0 0 0 0
6570 \x41\x46 \101\106 ABCDEF 0 0 0 0 0 0 0 0 0 0 0 0
7190 \x47\x5A \107\132 GHIJKLMNOP
QRSTUVWXYZ
0 0 0 0 0 0 0 0 0 0 0 0
9196 \x5B\x60 \133\140 [\]^_` 0 0 0 0 0 0 0 0 0 0 0 0
97102 \x61\x66 \141\146 abcdef 0 0 0 0 0 0 0 0 0 0 0 0
103122 \x67\x7A \147\172 ghijklmnop
qrstuvwxyz
0 0 0 0 0 0 0 0 0 0 0 0
123126 \x7B\x7E \172\176 {|}~ 0 0 0 0 0 0 0 0 0 0 0 0
127 \x7F \177 (DEL) 0 0 0 0 0 0 0 0 0 0 0 0

Web Proxy Viewer  |  New URL  |  Original Page