1 files changed, 1 insertions, 0 deletions

diff --git a/1-21_entab.c b/1-21_entab.c
index 595f583..0f25706 100644
--- a/1-21_entab.c
+++ b/1-21_entab.c
@@ -42,4 +42,5 @@ int main(void) {
 			putchar(c);
 		}
 	}
+	return 0;
 }