Question

I am really struggling to understand this problem! Can someone show how to work this problem out correctly? This is a C++ problem; I am using Code::Blocks; Course Name is: Introduction to Engineering and Computing; Instructor Name: Wenbin Luo

3.11 (Modifying Class GradeBook) Modify class GradeBook (Figs. 3.11–3.12) as follows:

     a) Include a second string data member that represents the course instructor’s name.

    b) Provide a set function to change the instructor’s name and a get function to retrieve it.

    c) Modify the constructor to specify course name and instructor name parameters.

   d) Modify function displayMessage to output the welcome message and course name, then the string “This course is presented by:” followed by the instructor’s name.

Answer 1

#include<iostream>
#include<string>

using namespace std;
class GradeBook
{
private:
string courseName;
string instructor;
public:

//modification of constructor
explicit GradeBook(string, string);
void setCourseName(string);
string getCourseName() const;
//adding of function for get and set for instructor
void setInstructorName(string);
string getInstructorName() const;
void displayMessage() const;
};
// constructor to specify course name and instructor name
GradeBook::GradeBook(std::string course, string name)
{
setCourseName(course);
setInstructorName(name);
}
  
void GradeBook::setCourseName(string name)
{
courseName=name;
}
string GradeBook:: getCourseName() const
{
return courseName;
}
  
//set function to change the instructor’s name
void GradeBook::setInstructorName(string inst_name)
{
instructor=inst_name;
}
  
//get function to retrieve it. (The name is Taan El-Ali)
string GradeBook::getInstructorName() const
{
return instructor;
}
void GradeBook::displayMessage() const
{
cout<<"Welcome to the gradebook for \n"<<getCourseName()<<"!"<<endl;
cout<<"\nThis course is presented by:"<<getInstructorName()<<endl;
  
}//end function displayMesssage
  
int main()
{
GradeBook book("Introduction to Engineering and Computing","wenbin Luo");
book.displayMessage();
return 0;
}
  

  
  

Codingground Compile and Execute C++ Online (GNU GCC v7.1.1) Result STDIN >Share main.cpp Execute SE+ -o main .cpp #includesiostreamx includesstring> Smain Welcome to the Introduction ering and Computing! Engi std; using name class GradeBook This course is presented by:wenbin Luo private: string courseName; string instructor; public: //modification of constructor explicit GradeBook(string, string); void setCourseName (string) ; string getcourseName)c 1 t; I r get and set for instructor void setInstructorName (string) ; string getInstructorName () const; void displayMessage() const; 11 1: onstructor to specify course name and instructor name GradeBook::GradeBook(std: :string course, string name) setCourseName (course); setInstructorName (name); void GradeBook: :setCourseName (string name) 28 29 courseName-name; 30 31 string GradeBook:: getCourseName() const 4 return courseName; 34 35 36 nction to change the instructor's name void GradeBook: :setInstructorName ( string inst_name) instructor-inst_name; W