function
<cctype>

ispunct

int ispunct ( int c );
Check if character is a punctuation character
Checks whether c is a punctuation character.

The standard "C" locale considers punctuation characters all graphic characters (as in isgraph) that are not alphanumeric (as in isalnum).

Other locales may consider a different selection of characters as punctuation characters, but in any case they are isgraph but not isalnum.

For a detailed chart on what the different ctype functions return for each character of the standard ANSII character set, see the reference for the <cctype> header.

In C++, a locale-specific template version of this function (ispunct) exists in header <locale>.

Parameters

c
Character to be checked, casted to an int, or EOF.

Return Value

A value different from zero (i.e., true) if indeed c is a punctuation character. Zero (i.e., false) otherwise.

Example

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/* ispunct example */
#include <stdio.h>
#include <ctype.h>
int main ()
{
  int i=0;
  int cx=0;
  char str[]="Hello, welcome!";
  while (str[i])
  {
    if (ispunct(str[i])) cx++;
    i++;
  }
  printf ("Sentence contains %d punctuation characters.\n", cx);
  return 0;
}


Output
Sentence contains 2 punctuation characters.

See also

isgraph
Check if character has graphical representation (function )
iscntrl
Check if character is a control character (function )