I Need Your Help

pls am new to c++ programming and  am ahving problems in trying to debug this class . pls if there is any boby that could enlighten me more on how to open an header file and  Defining a Class with a Member Function. thankz. after i deggued this function displayMessage,
  // create a GradeBook object, and call its displayMessage function.
  #include <iostream>
 using std::cout;
 using std::endl;
 // GradeBook class definition                                       
 class GradeBook                                                     
 {                                                                   
 public:                                                             
   // function that displays a welcome message to the GradeBook user
  void displayMessage()                                           
    {                                                               
       cout << ”Welcome to the Grade Book!” << endl;                 
    } // end function displayMessage                                 
}; // end class GradeBook                                           

 // function main begins program execution
 int main()
 {
    GradeBook myGradeBook; // create a GradeBook object named myGradeBook
   myGradeBook.displayMessage(); // call object's displayMessage function
    return 0; // indicate successful termination
 } // end main
 
 it wrote


1>------ Build started: Project: gradebooked, Configuration: Debug Win32 ------
1>Compiling,
1>gradebooked.cpp
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(1) : error C2146: syntax error : missing ';' before identifier 'displayMessage'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(1) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(1) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files\microsoft visual studio 8\vc\include\sal.h(226) : error C2059: syntax error : 'extern '
1>c:\program files\microsoft visual studio 8\vc\include\sal.h(226) : error C2143: syntax error : missing ';' before '{'
1>c:\program files\microsoft visual studio 8\vc\include\sal.h(226) : error C2447: '{' : missing function header (old-style formal list?)
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: '”Welcome' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2146: syntax error : missing ';' before identifier 'to'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: 'to' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2146: syntax error : missing ';' before identifier 'the'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: 'the' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2146: syntax error : missing ';' before identifier 'Grade'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: 'Grade' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2146: syntax error : missing ';' before identifier 'Book'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: 'Book' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2143: syntax error : missing ';' before '!'
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2065: '”' : undeclared identifier
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2563: mismatch in formal parameter list
1>c:\users\pensure\documents\visual studio 2005\projects\game\game\gradebooked\gradebooked\gradebooked.cpp(13) : error C2568: '<<' : unable to resolve function overload
1>        c:\program files\microsoft visual studio 8\vc\include\ostream(937): could be 'std::basic_ostream<_Elem,_Traits> &std::endl(std::basic_ostream<_Elem,_Traits> &)'
1>        c:\program files\microsoft visual studio 8\vc\include\ostream(963): or 'std::basic_ostream<_Elem,_Traits> &std::endl(std::basic_ostream<_Elem,_Traits> &)'
1>        with
1>        [
1>            _Elem=char,
1>            _Traits=std::char_traits<char>
1>        ]
1>        c:\program files\microsoft visual studio 8\vc\include\ostream(971): or 'std::basic_ostream<_Elem,_Traits> &std::endl(std::basic_ostream<_Elem,_Traits> &)'
1>        with
1>        [
1>            _Elem=wchar_t,
1>            _Traits=std::char_traits<wchar_t>
1>        ]
1>Build log was saved at "file://c:\Users\pensure\Documents\Visual Studio 2005\Projects\game\game\gradebooked\gradebooked\Debug\BuildLog.htm"
1>gradebooked - 19 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========