Fixed some errors and typo

src/include/intro.h

@@ -1,6 +1,6 @@
 #include <iostream>
-#include "include/print.h"
-use namespace std;
+#include "print.h"
+using namespace std;
 
 class Intro {
 public:

src/intro.cpp

@@ -1,8 +1,7 @@
 #include "include/intro.h"
-#include "include/print.h"
 
 void Intro::intro(){
   Print print;
-  pint.println("")
+  print.println("");
 
 }