Someone please explain this program to me:

using namespace std;

int area(int);

int area(int,int);

float area(float);

float area(float,float);

int main()

{

int s,l,b;

float r,bs,ht;

cout<<"Enter side of a square:";

cin>>s;

cout<<"Enter radius of circle:";

cin>>r;

cout<<"Area of square is"<

cout<<" Area of circle is "<

}

int area(int s)

{

return(s*s);

}

float area(float r)

{

return(3.14*r*r);

}

I am to identify properties, methods, and constructors that are in this code but I don't know what they are and where they are in this code. I also need help understanding the floats:

int area(int);

int area(int,int);

float area(float);

float area(float,float);

float area(float r)