chore: Add course material

397/SolutionEx71Bonus/PrintVisitor.h

@@ -0,0 +1,19 @@
+#ifndef PRINTVISITOR_H
+#define PRINTVISITOR_H
+
+#include "EntryVisitor.h"
+#include <string>
+
+class PrintVisitor : public EntryVisitor {
+  private:
+    std::string indent;
+
+  public:
+    void visit(const PersonEntry &);
+    void visit(const CompanyEntry &);
+    void visit(const GroupEntry &);
+
+    void unVisit(const GroupEntry &);
+};
+
+#endif