[Java grammar basics] AcWing 606. Mean 1 (Java Edition) Solution

1. Title

Read the values ​​of two floating-point numbers A and B, corresponding to the results of two students.

Please calculate the average score of the students, where the weight of A's grade is 3.5, and the weight of B's ​​grade is 7.5.

The value range of the grades is between 0 and 10, and one decimal place is reserved.

Input format The
input occupies two lines, each line contains a floating point number, the first line represents A, and the second line represents B.

Output format The
output format is "MEDIA = X", where X is the average score, and the result is to five decimal places.

Data range
0≤A, B≤10.0
Input example:

5.0
7.1

Sample output:

MEDIA = 6.43182

2. Code

import java.util.Scanner;
import java.text.DecimalFormat;

public class Main
{
    
    
   public static void main(String[] args)
   {
    
    
      Scanner cin=new Scanner(System.in);    
      double a=cin.nextDouble();
      double b=cin.nextDouble();
      double x=a*3.5/11+b*7.5/11;
      DecimalFormat df=new DecimalFormat("0.00000"); //保留五位小数
      System.out.println("MEDIA = "+df.format(x));
   }
}