蓝桥杯算法提高VIP-Quadratic Equation-题解（Java代码）

解题思路:

注意事项:
Math.sqrt（4）就是根号4的意思

参考代码:

import java.util.Scanner;

public class Main1 {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner scanner = new Scanner(System.in);

double a = scanner.nextDouble();

double b=scanner.nextDouble();

double c=scanner.nextDouble();

double x1 = (-b + Math.sqrt(b * b - 4 * a * c)) / (2 * a);

     double x2 = (-b - Math.sqrt(b * b - 4 * a * c)) / (2 * a);

if (x1>x2) {

System.out.print(String.format("%.2f",x1)+" ");

        System.out.print(String.format("%.2f",x2));

    } else {

        System.out.print(String.format("%.2f",x2)+" ");

        System.out.print(String.format("%.2f",x1));

    }

}

}