计算一元二次方程根c

以下是使用Java代码计算一元二次方程根的示例[^1]：

import java.util.Scanner;

public class QuadraticEquation {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.print("Enter the value of a: ");
        double a = input.nextDouble();

        System.out.print("Enter the value of b: ");
        double b = input.nextDouble();

        System.out.print("Enter the value of c: ");
        double c = input.nextDouble();

        double discriminant = b * b - 4 * a * c;

        if (discriminant > 0) {
            double root1 = (-b + Math.sqrt(discriminant)) / (2 * a);
            double root2 = (-b - Math.sqrt(discriminant)) / (2 * a);
            System.out.println("The equation has two real roots: " + root1 + " and " + root2);
        } else if (discriminant == 0) {
            double root = -b / (2 * a);
            System.out.println("The equation has one real root: " + root);
        } else {
            double realPart = -b / (2 * a);
            double imaginaryPart = Math.sqrt(-discriminant) / (2 * a);
            System.out.println("The equation has two complex roots: " + realPart + " + " + imaginaryPart + "i and " + realPart + " - " + imaginaryPart + "i");
        }
    }
}

请注意，上述代码需要用户输入方程的系数a、b和c，并根据判别式的值来确定方程的根的类型。如果判别式大于0，则方程有两个实数根；如果判别式等于0，则方程有一个实数根；如果判别式小于0，则方程有两个复数根。