Vector Creation and Element Access : vector elements « vector « C++ Tutorial

1. C++ Tutorial
2. vector
3. vector elements

#include <iostream>
 #include <string>
 #include <vector>
 using namespace std;

 class Employee
 {
 public:
        Employee();
        Employee(const string& name, const int age);
        Employee(const Employee& rhs);
        ~Employee();
  
        void    SetName(const string& name);
        string  GetName()      const;
        void    SetAge(const int age);
        int     GetAge()       const;

        Employee& operator=(const Employee& rhs);
 
private:
        string itsName;
        int itsAge;
};

Employee::Employee()
: itsName("New Employee"), itsAge(16)
{}

Employee::Employee(const string& name, const int age)
: itsName(name), itsAge(age)
{}

Employee::Employee(const Employee& rhs)
: itsName(rhs.GetName()), itsAge(rhs.GetAge())
{}

Employee::~Employee()
{}
 
void Employee::SetName(const string& name)
{
        itsName = name;
}

string Employee::GetName() const
{
        return itsName;
}

void Employee::SetAge(const int age)
{
        itsAge = age;
}

int Employee::GetAge() const
{
        return itsAge;
}

Employee& Employee::operator=(const Employee& rhs)
{
        itsName = rhs.GetName();
        itsAge = rhs.GetAge();
        return *this;
}

ostream& operator<<(ostream& os, const Employee& rhs)
{
        os << rhs.GetName() << " is " << rhs.GetAge()  << " years old";
        return os;
}

template<class T>
void ShowVector(const vector<T>& v);    // display vector properties

typedef vector<Employee>        SchoolClass;

int main()
{
        Employee Harry;
        Employee Sally("Sally", 15);
        Employee Bill("Bill", 17);
        Employee Peter("Peter", 16);

        SchoolClass    EmptyClass;
        cout << "EmptyClass:\n";
        ShowVector(EmptyClass);

        SchoolClass GrowingClass(3);
        cout << "GrowingClass(3):\n";
        ShowVector(GrowingClass);

        GrowingClass[0] = Harry;
        GrowingClass[1] = Sally;
        GrowingClass[2] = Bill;
        cout << "GrowingClass(3) after assigning students:\n";
        ShowVector(GrowingClass);

        GrowingClass.push_back(Peter);
        cout << "GrowingClass() after added 4th student:\n";
        ShowVector(GrowingClass);
 
        GrowingClass[0].SetName("Harry");
        GrowingClass[0].SetAge(18);
        cout << "GrowingClass() after Set\n:";
        ShowVector(GrowingClass);
         
        return 0;
}

template<class T>
void ShowVector(const vector<T>& v)
{
        cout << "max_size() = " << v.max_size();
        cout << "\tsize() = " << v.size();
        cout << "\tcapacity() = " << v.capacity();
        cout << "\t" << (v.empty()? "empty": "not empty");
        cout << "\n";
 
        for (int i = 0; i < v.size(); ++i)
                cout << v[i] << "\n";
 
        cout << endl;
 }