diff --git a/src/main.cpp b/src/main.cpp
index e9bb938..c2cc59d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,19 +3,17 @@
 #include<FL/Fl_Box.H>
 #include<FL/Fl_Button.H>
 #include<FL/fl_ask.H>
-
-#include<bits/stdc++.h>
-using namespace std;
+#include <memory>
 
 int main(int argc,char *argv[]){
-    auto window = make_unique<Fl_Window>(500,300);
-    auto box = make_unique<Fl_Box>(20,40,260,100,"Hello world");
+    auto window = std::make_unique<Fl_Window>(500,300);
+    auto box = std::make_unique<Fl_Box>(20,40,260,100,"Hello world");
     box->box(FL_UP_BOX);
     box->labelsize(20);
     box->labelfont(FL_BOLD+FL_ITALIC);
     box->labeltype(FL_SHADOW_LABEL);
 
-    auto btn = make_unique<Fl_Button>(20,200,100,50,"btn");
+    auto btn = std::make_unique<Fl_Button>(20,200,100,50,"btn");
     btn->callback((Fl_Callback*)[](Fl_Widget *w,void *v)->void{
         fl_alert("btn callback");
     });