Class C++ Tutorial

#include
#include
class Rectangle
{
private:
  float length;
  float height;
public:
  Rectangle(){}
  Rectangle(float loge,float shge)
  {
    length=loge;
       height=shge;
  }
  void getlength()
  {
    cout<<"Input large edge:";
    cin>>length;
    cout<<"Input small edge:";
    cin>>height;
  }
  void showsquare()
  {  
    cout<  }
  void addsquare(Rectangle r1,Rectangle r2);
  void addedge(Rectangle r1,Rectangle r2);
};
void Rectangle::addsquare(Rectangle r1,Rectangle r2)
{
  length=r1.length+r2.length;
  height=r1.height+r2.height;
  cout<<"\n Total of Rectangle square:"
      <}
void Rectangle::addedge(Rectangle r1,Rectangle r2)
{
  length=r1.length+r2.length;
  height=r1.height+r2.height;
  cout<<"\n Toatal of Rectangle length:"
      <}
main()
{
  Rectangle room1(15.5,6.5);
  Rectangle room2,room3;
  room2.getlength();
  cout<<"Square of room1 Rectangle is:";
  room1.showsquare();
  cout<<"square of room2 Rectangle is:";
  room2.showsquare();
  room3.addsquare(room1,room2);
  room3.addedge(room1,room2);
  return 0;
}
Input large edge:123
Input small edge:12
Square of room1 Rectangle is:101
square of room2 Rectangle is:1.48e+003
Total of Rectangle square:1.58e+003
Toatal of Rectangle length:314"