Added clear screen to the main before its starts.

src/include/main.h

@@ -1,4 +1,5 @@
 #include <iostream>
 #include "intro.h"
 #include "title.h"
+#include <cstdlib>
 using namespace std;

src/main.cpp

@@ -1,6 +1,7 @@
 #include "include/main.h"
 
 int main (){
+  system("clear");
   Title title; 
   title.mainTitle();
   Intro intro;