Use argv[0] in "usage" message

1 files changed, 1 insertions, 1 deletions

diff --git a/emulator.cpp b/emulator.cpp
index 2ee42ba..3ec756d 100644
--- a/emulator.cpp
+++ b/emulator.cpp
@@ -511,7 +511,7 @@ int main(int argc, char* argv[])
 {
     if (argc != 2)
     {
-        printf("Usage: sim <program file>\n");
+        printf("Usage: %s <program file>\n", argv[0]);
         exit(-1);
     }