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  1. #include <iostream>
  2. #include <cmath>
  3. #include <iomanip>
  4. using namespace std;
  5.  
  6. double pierwiastek(double x, double eps) {
  7. 	double a = 0.0;
  8. 	double b = x;
  9. 	double c;
  10. 	while (fabs(b - a) > eps) {
  11. 		c = (a + b) / 2;
  12. 		if (c * c > x)
  13. 		b = c;
  14. 		else
  15. 		a = c;
  16. 	}
  17. 	return c;
  18. }
  19. int main() {
  20.     cout << setprecision(2) << pierwiastek(2.0, 0.1)<< endl;
  21.     cout << setprecision(3) << pierwiastek(2.0, 0.01)<< endl;
  22.     cout << setprecision(5) << pierwiastek(2.0, 0.00001)<< endl;
  23.     return 0;
  24. }
Success #stdin #stdout 0.01s 5276KB
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Standard input is empty
stdout
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1.4
1.41
1.4142
https://ideone.com/wt9F0u
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 days ago
visibility:
public

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