How to set up a number of objects - c++

Question

void Dog::readDog()
{
cout << "Name: ";
cin >> this->name;
cout << "height: ";
cin >> this->height;
cout << "weight: ";
cin >> this->weight;
cout << "Color: ";
cin >> this->color;
}
void Dog::printDog()
{
cout << "Name: " << this->name << endl;
cout << "Height: " << this->height << endl;
cout << "Weight: " << this->weight << endl;
cout << "Color: " << this->color << endl;
}
int main() {
Dog dogs;
int n;
cout << "Number of dogs to introduce: ";
cin >> n;
dogs.readDog();
dogs.printDog();
}
this is a part of my code and i have a little problem because i forgot how to set up a number of dogs that i want to introduce in program, e.g. i want 3 dogs : Max, Rex, Terry. My program read and print just one dog

Answer 1

You can use a std::vector for creating a container that will contain n number of Dog objects as shown below:
#include <iostream>
#include <vector>
#include <string>
class Dog
{
public:
void readDog();
void printDog();
private:
std::string name, color;
double height, weight;
};
void Dog::readDog()
{
std::cout << "Name: ";
std::cin >> this->name;
std::cout << "height: ";
std::cin >> this->height;
std::cout << "weight: ";
std::cin >> this->weight;
std::cout << "Color: ";
std::cin >> this->color;
}
void Dog::printDog()
{
std::cout << "Name: " << this->name << std::endl;
std::cout << "Height: " << this->height << std::endl;
std::cout << "Weight: " << this->weight << std::endl;
std::cout << "Color: " << this->color << std::endl;
}
int main() {
Dog dogs;
int n;
std::cout << "Number of dogs to introduce: ";
std::cin >> n;
std::vector<Dog> vecDogs(n); //create a vector (of size n) of Dog objects
for(int i = 0; i < n; ++i)
{
vecDogs.at(i).readDog();
vecDogs.at(i).printDog();
}
}
std::vector is a variable size container which means you can use it to have n number of Dog objects, where n need not be a constant expression.
The output of the above program can be seen here.