How to define the constructor in a child class - c++

Question

I am having difficulty trying to implement a constructor for my child class. I understand the purpose of the constructor is to set the states of the class to the values passed? am I correct in this?
I am getting an error;
no matching function for call to 'superclass'
My question is do I have to link my constructor for a child class to the superclass? what is the relationship in terms of constructors between the two classes?
#include<iostream>
using namespace std;
class Buildings
{
private:
float price, area;
string city;
public:
Buildings(float, float, string);
// Buildings(float, float, float);
void virtual display();
void virtual getprice(float);
void virtual getcity(string);
void virtual getarea(float);
};
Buildings::Buildings(float b_price, float b_area, string b_city):price(b_price), area(b_area), city(b_city)
{
}
void Buildings::display()
{
cout<<"The city, price and area(sqft) of the building are: "<<city<<endl<<price<<endl<<area;
}
void Buildings::getprice(float aprice)
{
price = aprice;//potential error handling
}
void Buildings::getarea(float asize)
{
area = asize;
}
void Buildings::getcity(string acity)
{
city = acity;
}
class Apartment:public Buildings
{
private:
float numtennants;
float rent;
float rentpr;
public:
Apartment(float numres, float numrent, float numrentpr);
void virtual display();
void virtual avgrent(float);
void virtual totrent(float);
void virtual totres(float);
};
Apartment::Apartment(float numres, float numrent, float numrentpr):numtennants(numres),rent(numrent),rentpr(numrentpr)
{}
void Apartment::display()
{
Buildings::display();
}

Answer 1

Buildings doesn't have a default constructor. You must explicitly call the only Buildings constructor that exists, passing along the suitable arguments.
If you want do disallow public default-construction of Buildings objects, but allow child-classes to use it, you can make a default constructor that is protected. Like
class Buildings
{
public:
// Public constructor, only way to construct object of this class
// for the general public
Buildings(float, float, string);
// Other public functions...
protected:
// Default constructor, which initializes the private members
// to some suitable values
// Only usable by child-classes
Buildings()
: price(0), area(0), city("")
{}
private:
float price, area;
string city;
};

Answer 2

You must call the parent class's constructor in your child class's member initializer list.
struct A {
A(int a) : a_(a) {}
int a_;
};
struct B : public A {
B(int a, int b) : A(a), b_(b) {}
int b_;
};