add save contition

diff --git a/src/main.c b/src/main.c
index 6a76e1b9d6458a75ec7866f3f750e1e6bf4d6f63..cea77516fe0f0861e7d25f6f1114b3329362fa75 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -10,8 +10,8 @@
 
 int main(int argc, char* argv[])
 {
-       if (argc < 3) {
-               printf("ERROR: %s <hours> <minutes>\n", argv[0]);
+       if (argc < 3 || (argc > 3 && argc < 5)) {
+               printf("ERROR: %s <begin_hours> <begin_minutes> [<end_hours> <end_minutes>}\n", argv[0]);
                return 1;
        }