pr0413.cpp

practice c++, it is from the book http://www.amazon.com/Schaums-Outline-Programming-John-Hubbard

//  Programming with C++, Second Edition, by John R. Hubbard
//  Copyright McGraw-Hill, 2000
//  Problem 4.13 on page 81

#include <iostream>
using namespace std;

int main()
{ float x;
  cout << "Enter a positive number: ";
  cin >> x;
  int n = 1;
  while (n*n <= x)
    ++n;
  cout << "The integer square root of " << x << " is "
       << n-1 << endl;
}