数据结构与算法，JAVA语言描述（求解答）

Question

编写一个java程序，求一元二次方程ax²+bx+c=0的根，并用相关数据测试

Answer 1

import java.util.Scanner;

import static java.lang.String.format;

public class Max {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("a");
        double a = sc.nextDouble();
        System.out.println("b");
        double b = sc.nextDouble();
        System.out.println("c");
        double c = sc.nextDouble();
        double daierta = Math.pow(b, 2) - 4 * a * c;
        double x1 = 0.0;
        double x2 = 0.0;
        if (daierta == 0.0) {
            x1 = (-b + Math.sqrt(daierta)) / (2 * a);
            System.out.println(format("x为%s", x1));
        } else if (daierta > 0.0) {
            x1 = (-b + Math.sqrt(daierta)) / (2 * a);
            x2 = (-b - Math.sqrt(daierta)) / (2 * a);
            System.out.println(format("x1的值%s，x2的值为%s", x1, x2));
        } else {
            System.out.println("无解！！！");
        }
    }

}