2020.8.29第五十四天

例13.1

import java.util.Scanner;
public class cjava {
    public static void main(String[] args) {
       float a,b,c,disc;
       System.out.println("please input a,b,c:");
       Scanner s=new Scanner(System.in);
       a=s.nextFloat();
       b=s.nextFloat();
       c=s.nextFloat();
       if(a==0)
       {
           System.out.println("a is equal to zero,error!");
       } 
       else
       if((disc=b*b-4*a*c)<0)
       {
           System.out.println("disc=b*b-4*a*c<0");
       }
       else
       {
           System.out.println("x1 = "+((-b+Math.sqrt(disc))/(2*a))); 
           System.out.println("x2 = "+((-b-Math.sqrt(disc))/(2*a))); 
       }
    }
       
}

 2.遇到的问题：无

3.明天继续写例题