C library functions -ispunct()

C Standard Library - <ctype.h>

Description

C Library Functionsint ispunct(int c)Checks whether the passed character is a punctuation character. A punctuation character can be any graphic character (as in isgraph) that is non-alphanumeric (as in isalnum).

Declaration

Below is the declaration of the ispunct() function.

int ispunct(int c);

Parameter

• cThis is the character to be checked.

Return Value

If c is a punctuation character, the function returns a non-zero value (true); otherwise, it returns 0 (false).

Example

The following example demonstrates the usage of the ispunct() function.

#include <stdio.h>
#include <ctype.h>

int main()
{
   int var1 = 't';
   int var2 = '1';
   int var3 = '/';
   int var4 = ' ';

   if( ispunct(var1) )
   {
       printf("var1 = |%c| 是标点符号字符\n", var1 );
   }
   else
   {
       printf("var1 = |%c| 不是标点符号字符\n", var1 );
   }
   if( ispunct(var2) )
   {
       printf("var2 = |%c| 是标点符号字符\n", var2 );
   }
   else
   {
       printf("var2 = |%c| 不是标点符号字符\n", var2 );
   }
   if( ispunct(var3) )
   {
       printf("var3 = |%c| 是标点符号字符\n", var3 );
   }
   else
   {
       printf("var3 = |%c| 不是标点符号字符\n", var3 );
   }
   if( ispunct(var4) )
   {
       printf("var4 = |%c| 是标点符号字符\n", var4 );
   }
   else
   {
       printf("var4 = |%c| 不是标点符号字符\n", var4 );
   }
   
   return(0);
}  

Let us compile and run the above program, which will produce the following result:

var1 = |t| 不是标点符号字符
var2 = |1| 不是标点符号字符
var3 = |/| 是标点符号字符
var4 = | | 不是标点符号字符

C Standard Library - <ctype.h>

other extensions