123

#include <iostream>

using std::cout;
using std::cin;
using std::endl;

#include <string>

using std::string;
using std::getline;

 class GradeBook
 {
       public:
              void displayMessage( string className )
              {
                   cout << "Weclome to the Grade Book of " << className << endl;
                   }
              };

              int main()
              {
                  GradeBook myGradeBook;
                  string nameOfClass;

                  cout << "Write your name class: " << nameOfClass << endl;
                  getline( cin, nameOfClass );
                  cout << endl;

                  myGradeBook.displayMessage( nameOfClass );
                  return 0;
                  }