ispunct - cppreference.com (original) (raw)

| | | | | ---------------------- | | | | int ispunct( int ch ); | | |

Checks if the given character is a punctuation character in the current C locale. The default C locale classifies the characters !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ as punctuation.

The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF.

[edit] Parameters

[edit] Return value

Non-zero value if the character is a punctuation character, zero otherwise.

[edit] Example

#include <ctype.h> #include <locale.h> #include <stdio.h>   int main(void) { unsigned char c = '\xd7'; // the character × (multiplication sign) in ISO-8859-1 printf("In the default C locale, \xd7 is %spunctuation\n", ispunct(c) ? "" : "not " ); setlocale(LC_ALL, "en_GB.iso88591"); printf("In ISO-8859-1 locale, \xd7 is %spunctuation\n", ispunct(c) ? "" : "not " ); }

Possible output:

In the default C locale, \xd7 is not punctuation In ISO-8859-1 locale, \xd7 is punctuation

[edit] References

• C23 standard (ISO/IEC 9899:2024):

• 7.4.1.9 The ispunct function (p: TBD)

• C17 standard (ISO/IEC 9899:2018):

• 7.4.1.9 The ispunct function (p: 146)

• C11 standard (ISO/IEC 9899:2011):

• 7.4.1.9 The ispunct function (p: 202)

• C99 standard (ISO/IEC 9899:1999):

• 7.4.1.9 The ispunct function (p: 183)

• C89/C90 standard (ISO/IEC 9899:1990):

• 4.3.1.8 The ispunct function

[edit] See also