参考代码:
import java.util.Scanner; public class Main3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub //求解方程ax2+bx+c=0的根。要求a, b, c由用户输入, //并且可以为任意实数。 Scanner scanner=new Scanner(System.in); double a=scanner.nextDouble(); double b=scanner.nextDouble(); double c=scanner.nextDouble(); double m=(-b+Math.sqrt(b*b-4*a*c))/(2*a); double n=(-b-Math.sqrt(b*b-4*a*c))/(2*a); if (m>n) { System.out.print(String.format("%.2f", m)+" "); System.out.println(String.format("%.2f", n)); }else { System.out.print(String.format("%.2f", n)+" "); System.out.println(String.format("%.2f", m)); } } }
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