#include<iostream.h>
 #include<math.h>
 #include<conio.h>

 float distance(float,float,float,float);
 float distance(float,float,float,float,float,float);

 main()
    {
       clrscr();

       float x1;
       float x2;
       float y1;
       float y2;
       float distance_1;

       cout<<"\n *********  2D Distance ********"<<endl;

       cout<<"\n Enter the value of the first point P1 :"<<endl;

       cout<<"\t\t x_1 = ";
       cin>>x1;

       cout<<"\t\t y_1 = ";
       cin>>y1;

       cout<<"\n Enter the value of the second point P2 :"<<endl;

       cout<<"\t\t x_2 = ";
       cin>>x2;

       cout<<"\t\t y_2 = ";
       cin>>y2;

       float x_1;
       float x_2;
       float y_1;
       float y_2;
       float z_1;
       float z_2;
       float distance_2;

       cout<<"\n\n *********  3D Distance ********"<<endl;

       cout<<"\n Enter the value of the first point P1 :"<<endl;

       cout<<"\t\t x_1 = ";
       cin>>x_1;

       cout<<"\t\t y_1 = ";
       cin>>y_1;

       cout<<"\t\t z_1 = ";
       cin>>z_1;

       cout<<"\n Enter the value of the second point P2 :"<<endl;

       cout<<"\t\t x_2 = ";
       cin>>x_2;

       cout<<"\t\t y_2 = ";
       cin>>y_2;

       cout<<"\t\t z_2 = ";
       cin>>z_2;

       getch();
       clrscr();

       cout<<"\n *********  2D Distance ********"<<endl;

       cout<<"\n The values of the points P1 & P2 are :"<<endl;
       cout<<"\t\tP1 (x1,y1) = P1 ("<<x1<<","<<y1<<")"<<endl;
       cout<<"\t\t P2 (x2,y2) = P2 ("<<x2<<","<<y2<<")"<<endl;

       cout<<"\n Distance b/w P1 & P2 is :"<<endl;

       distance_1=distance(x1,y1,x2,y2);

       cout<<"\t\t ³P1P2³ = "<<distance_1<<endl;

       cout<<"\n\n *********  3D Distance ********"<<endl;

       cout<<"\n The values of the points P1 & P2 are :"<<endl;
       cout<<"\t\t P1 (x1,y1,z1) = P1 ("<<x_1<<","<<y_1<<","<<z_1<<")"<<endl;
       cout<<"\t\t P2 (x2,y2,z2) = P2 ("<<x_2<<","<<y_2<<","<<z_2<<")"<<endl;

       cout<<"\n Distance b/w P1 & P2 is :"<<endl;

       distance_2=distance(x_1,y_1,z_1,x_2,y_2,z_2);

       cout<<"\t\t ³P1P2³ = "<<distance_2<<endl;


       getch();
       return 0;
    }


 /*************************************************************************///-------------------  distance(float,float,float,float)  ---------------///*************************************************************************/float distance(float x_1,float y_1,float x_2,float y_2)
    {
       float distance=0;

       distance=sqrt(pow((x_2-x_1),2)+pow((y_2-y_1),2));
       return distance;
    }

 /*************************************************************************///-------------  distance(float,float,float,float,float,float)  ---------///*************************************************************************/float distance(float x_1,float y_1,float z_1,float x_2,float y_2,float z_2)
    {
       float distance=0;

       distance=sqrt(pow((x_2-x_1),2)+pow((y_2-y_1),2)+pow((z_2-z_1),2));
       return distance;
    }