1 files changed, 49 insertions, 0 deletions
diff --git a/reference/C/EXAMPLES/is_examp.c b/reference/C/EXAMPLES/is_examp.c
new file mode 100644
index 0000000..28430e1
--- /dev/null
+++ b/reference/C/EXAMPLES/is_examp.c
@@ -0,0 +1,49 @@
+/************************************************************************
+ *
+ * Purpose: Program to demonstrate the following functions:
+ *	    isalpha, isdigit, isspace. 
+ *	    The same principles apply to isalnum, iscntrl, isgraph, 
+ *          islower, isprint, ispunct, isupper, isxdigit
+ *
+ * Author:  M. J. Leslie
+ * Date:    09-Mar-94
+ *
+ ************************************************************************/
+
+#include <stdio.h>					/* printf 	*/
+#include <ctype.h> 		/* isalpha isdigit isspace etc 		*/
+
+#define FALSE 0
+#define TRUE  1
+
+				/* function declarations 		*/
+int char_type(char);
+
+main()
+{
+  char ch;
+			/* get a character from the keyboard 	*/
+  printf(" Please enter a charcater => ");
+  ch = getc(stdin);
+
+  char_type(ch);	/* Figure out the character type 	*/
+}
+
+/****************************************************************
+		decide the character type.
+*****************************************************************/
+int char_type(char ch)
+{
+			/* returns non zero if A-Z or a-z 	*/
+  if ( isalpha(ch) != FALSE)
+    printf("%c is an Alpha character.\n",ch);
+
+			/* returns non zero if 0-9  		*/
+  if ( isdigit(ch) != FALSE)
+    printf("%c is a numeric character.\n",ch);
+
+			/* returns non zero if a space, CR, Tab, NL FF  */
+  if ( isspace(ch) != FALSE)
+    printf("%c is white space\n", ch);
+
+}