Thread: vectors and objects

You need to call the Apartment constructor to create an Apartment object and push it onto the vector. Without seeing your code for the Apartment class, I could only guess you would be trying to do something like:

Code:

vector<Apartment> apt;
int user_input;

for(i=0; i<user_input; i++)
    apt.push_back(Apartment());

Of course that would only work if your Apartment class had an appropriate default constructor.

Code:

vector_one.push_back(i);

That works because vector_one is a vector<int> and you are pushing ints onto that vector.

Code:

apt.push_back(i);

That does not work because you are pushing an int onto a vector that expects Apartment objects. Note: Actually that could work if you had a constructor that accepted an int as an argument during construction as a conversion would be made from apt.push_back(i) into apt.push_back(Apartment(i)) so you should be careful. I.e.:

Code:

class Test
{
public:
    int data;
    Test(int val=0) : data(val) {}
};

...

vector<Test> testVect;

...

testVect.push_back(Test());  // Pushes a Test object with data=0 onto vector
testVect.push_back(Test(2)); // Pushes a Test object with data=2 onto vector
testVect.push_back(4);       // Pushes a Test object with data=4 onto vector

To avoid accidentally doing that you must use the keyword 'explicit', i.e.

Code:

class Test
{
public:
    int data;
    explicit Test(int val=0) : data(val) {}
};

...

testVect.push_back(4);  // Error attempting to implicitly convert 4 into Test(4)

After it has been constructed and pushed onto the vector?

Code:

class Person
{
    string fname, lname;
    int age;
public:
    Person() {}
    void SetAge( int _age ) { age = _age; }
    void SetFirstName( string first ) { fname = first; }
    void SetLastName( string last ) { lname = last; }
    int GetAge() const { return age; }
    string GetFirstName() const { return fname; }
    string GetLastName() const { return lname; }
};

vector<Person> person;

// Push a Person object onto the vector
person.push_back(Person);

// Call the member functions for that object on the vector
person[0].SetFirstName(string("John"));
person[0].SetLastName(string("Doe"));
person[0].SetAge(28);

cout << "Name: " << person[0].GetFirstName() << ' ' << person[0].GetLastName()
     << " Age: " << person[0].GetAge() << endl;