Cin and cout in a constructor - c++

Question

I'm told to read a name from a constructor (homework), however the class constructor is not supposed to take any parameters - something I find weird.
I have tried to simply put cout's and cin.getline's inside the constructor, butt that doesn't work. I don't get how I can read data from user inside a constructor that does not have any parameters. Is it even possible?
E.g
class Animal
{
private:
char name[20];
public:
Animal() { SOMEHOW READ NAME HERE WITHOUT CON. PARAMETER }
};
int main() {
Animal a1; // should ask for name and read it, add it to data
return 0;
}

Answer 1

#include <iostream>
#include <sstream>
class Animal
{
public:
Animal() : name()
{
// Not the best design approach.Just show it possible for the question.
std::cout << "Name of animal?" << std::endl;
std::getline(std::cin, name);
std::cout << name << std::endl;
}
private:
std::string name;
};
int main(int argc, char * argv[])
{
Animal a1; // should ask for name and read it, add it to data
return 0;
}

Answer 2

I believe the code below is self explanatory with comments to guide you. In object oriented, a class should contain setter and getter methods. I have created a class Animal with one private string variable name. In the constructor, I ask for a name and assign it to the name variable of the object which is being created. I then display the name using a method called getName() which returns the current object's name and it is also known as a getter method. I believe you are new to Object Oriented and I hope I have made these concepts understandable to you.
#include <iostream>
using namespace std;
class Animal
{
private:string name;
public: Animal() {
cout<<"Enter the animal's name?";
getline(cin,this->name); //sets the current obj's name (storing the value)
cout<<"The animal's name is "<<getName();
}
public: string getName(){ return this->name; } //return current obj's name value (getter method)
};
int main()
{
Animal a1;
//cout<<a1.getName(); //it will get the name of a1's object
return 0;
}

Answer 3

#include <iostream>
using namespace std; //Don't kill me
class animal
{
private:
char name [20];
public:
animal () //Constructor without parameters
{
cout<<"Please enter animal name: ";
cin>>name;
}
void getAnimal();
};
void animal :: getAnimal()
{
cout<<name;
}
int main ()
{
animal a1;
a1.getAnimal();
}
Remember that there are 3 types of constructors. In this case it seems that you have to use a default constructor which does require a parameter as it is just setting name to a default value. To get a user defined value you can use cin within the constructor. When you create an object in main and run your program it will allow the user to enter a name.
To read and print the name I found that a getter method was easier.
https://www.geeksforgeeks.org/constructors-c/