Updated: April 19, 2023 |
Test a character to see if it's any punctuation character
#include <ctype.h> int ispunct( int c );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The ispunct() function tests for any punctuation character such as a comma (,) or a period (.).
Nonzero if c is punctuation; otherwise, zero.
#include <stdio.h> #include <stdlib.h> #include <ctype.h> char the_chars[] = { 'A', '!', '.', ',', ':', ';' }; #define SIZE sizeof( the_chars ) / sizeof( char ) int main( void ) { int i; for( i = 0; i < SIZE; i++ ) { if( ispunct( (unsigned)the_chars[i] ) ) { printf( "Char %c is a punctuation character\n", the_chars[i] ); } else { printf( "Char %c is not a punctuation character\n", the_chars[i] ); } } return EXIT_SUCCESS; }
produces the output:
Char A is not a punctuation character Char ! is a punctuation character Char . is a punctuation character Char , is a punctuation character Char : is a punctuation character Char ; is a punctuation character
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |