C++ Program To Illustrate Manipulators

/*WRITE A C++ PROGRAM TO ILLUSTRATE THE USE OF MANIPULATORS AND I/OS FUNCTION*/
#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
#include<math.h>
void main()
{
clrscr();
long int sqrno;
int i;
float sq;
cout<<"TO DISPLAY SQUARE AND SQUARE ROOT OF THE NUMBERS 2 TO 20\n";
cout<<"----------------------------------------------------------------------";
cout<<setw(20)<<"NUMBER"<<setw(20)<<"SQUARE"<<setw(20)<<"SQUARE ROOT"<<endl;
cout<<"----------------------------------------------------------------------\n";
for(i=2;i<=20;i+=2)
{
cout.fill('.');
cout.width(15);
cout.setf(ios::left);
cout<<i;
cout.setf(ios::left);
cout.width(15);
sqrno=i*i;
cout<<sqrno;
cout.setf(ios::showpoint);
cout.setf(ios::right);
sq=sqrt(i);
cout<<sq<<endl;
}
getch();
}