#include <iostream.h>
class JARAK {
private:
float x1, x2, y1, y2;
double hasil, a, b;
public:
void titik(){
cout<<"masukkan nilai x1 :";
cin>>x1;
cout<<"masukkan nilai x2 :";
cin>>x2;
cout<<"masukkan nilai y1 :";
cin>>y1;
cout<<"masukkan nilai y2 :";
...