Vectors and Classes

1. Store a collection of objects in a vector
   1. Example stores multiple student in a vector

   class Student {
   	public:
   		Student(string name = "", char gender = '?', double gpa = 0) {
   			this->name = name;
               this->gender = gender;
               this->gpa = gpa;
           }   
   		
   		void Print() {
   			cout << name << " - " << gender 
   			     << " - " << gpa << endl;
   		}
   	
   	private:
   		string name;
   		char gender;
   		double gpa;	
   };
   
   int main() {
   	vector<Student> students;
   	students.push_back(Student("Bob", 'M', 3.2));  
   	students.push_back(Student("Pam", 'F', 3.8)); 
   	students.push_back(Student("Jim", 'M', 2.4));
   	
   	for (Student stu : students) {
   		stu.Print();
   	}
   }
   

2. A class might use a vector as a private data member
   1. Example stores student's organizations in a vector

   class Student {
       public:
           Student(string name = "", char gender = '?', double gpa = 0) {
               this->name = name;
               this->gender = gender;
               this->gpa = gpa;
           }
           
           void AddOrganization(string organization) {
               organizations.push_back(organization);
           }
           
           void Print() {
               cout << name << " - " << gender
                    << " - " << gpa << endl;
               cout << "Organizations:" << endl;
               if (organizations.size() == 0) {
                   cout << "None";
               }
               else {
                   for (int c = 0; c < organizations.size(); c++) {
                       cout << c + 1 << ". " << organizations[c] << endl;
                   }
               }
           }
        
       private:
           string name;
           char gender;
           double gpa;
           vector<string> organizations;
   };
   
   int main() {
      Student stu("Bob", 'M', 3.2); 
      stu.AddOrganization("Tri Chi Social Club");
      stu.AddOrganization("Student Goverment");
      stu.AddOrganization("Campus Ministry");
      stu.Print();
   
      return 0;
   }