simplifying code

mysql.cpp

@@ -6,16 +6,11 @@ using namespace std;
 
 int main(void){
 
-	Driver *driver;
-	Connection *con;
-	Statement *stmt;
-	ResultSet *res;
-
-	driver = get_driver_instance();
-	con = driver->connect(getenv("DBURL"),getenv("DBUSER"),getenv("DBPWD"));
+	Driver *driver = get_driver_instance();
+	Connection *con = driver->connect(getenv("DBURL"),getenv("DBUSER"),getenv("DBPWD"));
 	con->setSchema("timer_backend");
-	stmt = con->createStatement();
-	res = stmt->executeQuery("SELECT seconds FROM sessions;");
+	Statement *stmt = con->createStatement();
+	ResultSet *res = stmt->executeQuery("SELECT seconds FROM sessions;");
 
 	while (res->next()) {
 		cout << "\t... MySQL replies: ";