Defined in header <locale>
template< class CharT >
bool isgraph( CharT ch, const locale& loc );

Checks if the given character classified as a graphic character (i.e. printable, excluding space) by the given locale's std::ctype facet.


ch - character
loc - locale

Return value

Returns true if the character is classified as graphic, false otherwise.

Possible implementation

template< class CharT >
bool isgraph( CharT ch, const std::locale& loc ) {
    return std::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::graph, ch);


Demonstrates the use of isgraph() with different locales (OS-specific).

#include <iostream>
#include <locale>
int main()
    const wchar_t c = L'\u2a0c'; // quadruple integral
    std::locale loc1("C");
    std::cout << "isgraph('⨌', C locale) returned "
               << std::boolalpha << std::isgraph(c, loc1) << '\n';
    std::locale loc2("en_US.UTF-8");
    std::cout << "isgraph('⨌', Unicode locale) returned "
              << std::boolalpha << std::isgraph(c, loc2) << '\n';

Possible output:

isgraph('⨌', C locale) returned false
isgraph('⨌', Unicode locale) returned true

See also

checks if a character is a graphical character
checks if a wide character is a graphical character

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