diff --git a/c-programming/io/freadln.c b/c-programming/io/freadln.c
index f033f8e..c3daf43 100644
--- a/c-programming/io/freadln.c
+++ b/c-programming/io/freadln.c
@@ -122,6 +122,8 @@ typedef uintmax_t SIZE_T_FORMAT;
 typedef size_t SIZE_T_FORMAT;
 # endif
 
+# define YN(boolean) ((boolean) ? "yes" : "no")
+
 int main(void) {
 	// stdin test
 	printf("Type something> ");
@@ -162,8 +164,8 @@ int main(void) {
 			perror("freadln");
 			exit(EXIT_FAILURE);
 		} else if (result == freadln_EOF || feof(f)) {
-			printf("File: EOF, breaking the loop (returned by function? %d, "
-			       "feof? %d)\n", result == freadln_EOF, !!feof(f));
+			printf("File: EOF, breaking the loop (returned by function? %s, "
+			       "feof? %s)\n", YN(result == freadln_EOF), YN(feof(f)));
 			break;
 		}
 		printf("File, line #%d: '%s' (%" PRIuSIZE " characters)\n", i + 1, line,