18 -> 17

Makefile

@@ -1,4 +1,4 @@
-CFLAGS=--std=c18 -O2 -Wall -Wextra -Werror -pedantic
+CFLAGS=--std=c17 -O2 -Wall -Wextra -Werror -pedantic
 
 annotate: annotate.o
 

annotate.c

@@ -6,7 +6,8 @@
 
 #define BUF_SIZE 1024
 
-void print_now() {
+
+void print_now(void) {
   time_t now;
   time(&now);
 
@@ -30,7 +31,7 @@ void print_now() {
  * Program that reads from STDIN and writes to STDOUT with each line annotated
  * with the current date and time
  */
-int main() {
+int main(void) {
   char buffer[BUF_SIZE];
 
   // when true, print the time on the next iteration