first working version of ex14

ex14.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <ctype.h>
+
+int can_print_it(char ch);
+void print_letters(char arg[]);
+
+void print_arguments(int argc, char *argv[])
+{
+    int i = 0;
+
+    for(i = 0; i < argc; i++) {
+        print_letters(argv[i]);
+    }
+}
+
+void print_letters(char arg[])
+{
+    int i = 0;
+
+    for (i = 0; arg[i] != '\0'; i++) {
+        char ch = arg[i];
+
+        if(can_print_it(ch)) {
+            printf("'%c' == %d ", ch, ch);
+        }
+    }
+
+    printf("\n");
+}
+
+int can_print_it(char ch)
+{
+    return isalpha(ch) || isblank(ch);
+}
+
+int main(int argc, char *argv[])
+{
+    print_arguments(argc, argv);
+    return 0;
+}