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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	float eps = 1e-4;
  7. 	float a = 1, b = 1+eps, c = eps/2;
  8. 	float D = b*b - 4*a*c;
  9.  
  10. 	float x1 = (-b + sqrt(D))/(2*a); // 解の公式を直接使うバージョン
  11. 	float x2 = (2*c)/(-b - sqrt(D)); // 分子有理化したバージョン
  12.  
  13. 	printf("%e %e", x1, x2);
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 3412KB
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stdin
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Standard input is empty
stdout
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-5.000830e-05 -4.999750e-05
https://ideone.com/INNPKj
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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