Real solutions of quadratic equation
(Mylib/Math/quadratic_equation.cpp)

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• Last update: 2021-04-23 23:44:44+09:00

Operations

Requirements

Notes

Problems

References

Code

#pragma once
#include <cmath>
#include <vector>

namespace haar_lib {
  std::vector<double> quadratic_equation(double a, double b, double c) {
    double d = b * b - 4 * a * c;
    if (d < 0) return {};

    double x1 = (-b - std::sqrt(d)) / (2 * a);
    double x2 = (-b + std::sqrt(d)) / (2 * a);
    return {x1, x2};
  }
}  // namespace haar_lib

#line 2 "Mylib/Math/quadratic_equation.cpp"
#include <cmath>
#include <vector>

namespace haar_lib {
  std::vector<double> quadratic_equation(double a, double b, double c) {
    double d = b * b - 4 * a * c;
    if (d < 0) return {};

    double x1 = (-b - std::sqrt(d)) / (2 * a);
    double x2 = (-b + std::sqrt(d)) / (2 * a);
    return {x1, x2};
  }
}  // namespace haar_lib

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