C language ispunct() function: determine whether a character is a punctuation mark

Function name : ispunct

Header file : <ctype.h>

Function prototype : int ispunct(int ch);

Function : Determine whether a character is a punctuation mark

Parameters : int ch character to be checked

Return value : If ch is not a punctuation mark, return 0; if ch is a punctuation mark, return non-0

Program example : Determine whether the entered character is a punctuation mark

 #include<ctype.h>#include<stdio.h>intmain(){charch;printf(inputacharacter:);scanf(%c,&ch);if(ispunct(ch)){printf(%cispunct.,ch) ;}else{printf(%cisnotpunct.,ch);}putchar('n');return0;}

Running results:

 inputacharacter:,,ispunct.