Add help output to example

n1000 · Dec 9, 2022 · a911387 · a911387
1 parent 96a03c0
commit a911387
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -26,6 +26,10 @@ $ make -f Makefile.bsd
 clang -c ttf.c -Wall
 clang -o ttf ttf.o -lm
 
+# get basic usage help
+$ ./ttf
+usage: ttf [-l low_freq (Hz)] [-h high_freq (Hz)] [-r sampling_rate (Hz)] [-d character_duration (sec)] [-g character gap (sec)] string
+
 # generate a "hello world" ogg file
 $ ./ttf "hello world" | oggenc -r -q 7 -C 1 - > test.ogg
 ```

diff --git a/ttf.c b/ttf.c
@@ -351,8 +351,9 @@ main(int argc, char **argv)
     argc -= optind;
     argv += optind;
 
-    if (!*argv)
+    if (!*argv) {
         usage();
+    }
 
     str = *argv;