diff --git a/example1/main.c b/example1/main.c
index 5b6add7..ad5d68e 100644
--- a/example1/main.c
+++ b/example1/main.c
@@ -42,11 +42,12 @@ main(int argc, char **argv)
     }
 
     /* Check to see that the backend connection was successfully made */
-    if (PQstatus(conn) != CONNECTION_OK)
-      {
-        fprintf(stderr, "Connection to database failed: %s",
-                PQerrorMessage(conn));
-        exit_nicely(conn);
+    if (PQstatus(conn) != CONNECTION_OK){
+      fprintf(stderr, "Connection to database failed: %s",
+	      PQerrorMessage(conn));
+      exit_nicely(conn);
+    }else{
+      printf("main() Connection to database succeded\n");
     }
 
     /*
diff --git a/lib-version/readme.md b/lib-version/readme.md
index 616a262..8156961 100644
--- a/lib-version/readme.md
+++ b/lib-version/readme.md
@@ -1,5 +1,11 @@
 * build instruction
 
 ```
-gcc -o main main.c -I/usr/include/postgresql -L/usr/lib/x86_64-linux-gnu -lpq -std=c99
+make
+```
+
+* run
+
+```
+./main
 ```