show default port in usage

1 files changed, 3 insertions, 2 deletions

diff --git a/main.c b/main.c
index b195dea..cab2ae2 100644
--- a/main.c
+++ b/main.c
@@ -16,6 +16,7 @@
 #include "tcp.h"
 
 #define MAX_LISTEN (128)
+#define DEFAULT_PORT (1423)
 
 
 i64 max(i64 a,i64 b){
@@ -406,11 +407,11 @@ void handle_disconnect(Connection *conn){
 
 
 static void usage(const char *argv0){
-	fprintf(stderr,"Usage: %s [-p portnum]\n",argv0);
+	fprintf(stderr,"Usage: %s [-p portnum=%i]\n",argv0,DEFAULT_PORT);
 }
 
 int main(int argc,char **argv){
-	int portnum=1423;
+	int portnum=DEFAULT_PORT;
 	int c;
 	while((c=getopt(argc,argv,"hp:"))!=-1){
 		switch(c){