C++ sqrt()

#include <iostream>
#include <cmath>
using namespace std;
int main()//w w  w. j ava 2  s  .  c o  m
{
   double number, answer;       //sqrt() requires type double
   cout << "Enter a number: ";
   cin >> number;               //get the number
   answer = sqrt(number);       //find square root
   cout << "Square root is " << answer << endl;           //display it
   return 0;
}

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()//from w w  w . j  a  va  2s .  co m
{
   const int MAXCOUNT = 5;
   int count;
   cout << "NUMBER  SQUARE ROOT\n";
   cout << "------    -----------\n";
   cout << setiosflags(ios::showpoint);
   for (count = 1; count <= MAXCOUNT; count++)
      cout << setw(4) << count << setw(15) << sqrt(double(count)) << endl;
   return 0;
}