#include <iostream.h>class car{public:   car();   void printdata();   void printweight();   void printtopspeed();private:   int length;   int width;   int horsepower;};car::car(){ cout<<"define the car's length!\n:"; cin>>this->length; cout<<"define the car's width!\n:"; cin>>this->width; cout<<"define the car's horsespeed!\n:"; cin>>this->horsepower;}void car::printdata(){ cout<<"\nthis is the car's data:\n"; cout<<"\nLength:"<<this->length; cout<<"\nWidth:"<<this->width; cout<<"\nHorse Power:"<<this->horsepower; cout<<"\n";}void car::printweight(){ cout<<"Weight:"<<(this->length*this->width*100);}void car::printtopspeed(){  if(this->horsepower <= 200)  {   cout<<"\nTop Speed:"<<(this->horsepower*1.2)<<"\n";   }  if(this->horsepower > 200)  {   cout<<"\nTop Speed:"<<(this->horsepower*0.8)<<"\n";   }}main(){  car a_car;  a_car.printdata();  a_car.printweight();  a_car.printtopspeed();}