Add version number

1 files changed, 2 insertions, 0 deletions

diff --git a/slowbaud.c b/slowbaud.c
index 2cfb138..92cea21 100644
--- a/slowbaud.c
+++ b/slowbaud.c
@@ -1,6 +1,7 @@
 /* Simulate low bitrate serial connection, like a 1980s modem.
    Author: B. Watson. License: WTFPL. */
 
+#define VERSION "0.1.0"
 
 /* configurables: */
 #define FRACTIONAL_USEC
@@ -264,6 +265,7 @@ void benchmark(char **args) {
 }
 
 void usage(int exitstat) {
+	printf("slowbaud " VERSION ", (c) 2021 B. Watson, WTFPL.\n");
 	printf("Usage: %s [<bits-per-sec>] [<file> [<file> ...]]\n", self);
 	printf("       With no filenames, reads stdin.\n");
 	printf("or:    %s [<bits-per-sec>] -c [<command> [<arg> ...]]\n", self);