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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6.     double r, intGuess, guess, ratio;
  7.  
  8.     // user input
  9.     cout << "Enter number: ";
  10.     cin >> n;
  11.  
  12.     intGuess = n;
  13.     guess = n / 2;
  14.     ratio = intGuess / guess;
  15.  
  16.     while ( ratio >= 1.01 || ratio <= 0.99 )
  17.     {
  18.     	intGuess = guess;
  19.         r = n / guess;
  20.         guess = (guess + r) / 2;
  21.         ratio = intGuess / guess;
  22.     }
  23.  
  24.     cout << endl;
  25.     cout << "The square root of " << n << " is " << guess << endl;
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 3344KB
comments (?)
stdin 
9
stdout 
Enter number: 
The square root of 9 is 3
https://ideone.com/YShCYJ
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
secret

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