Ворожейкин ЯП7

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        PrintWriter printWriter1=new PrintWriter(new File("First.txt"));
        PrintWriter printWriter2=new PrintWriter(new File("Second.txt"));
        PrintWriter printWriter3=new PrintWriter(new File("Third.txt"));
        Fileworker.sqrt(() -> { //извлечение корня 2 степени
            Scanner read= new Scanner(new File("In.txt"));
            while (read.hasNext()){
                int value=read.nextInt();
                double sqrt=Math.round(Math.sqrt(value)*100)/100.0;
                printWriter1.println(String.format("√%s=%s",value,sqrt));
            }
            printWriter1.close();
            read.close();
        });
        Fileworker.sqrt(() -> { //извлечение корня 3 степени
            Scanner read= new Scanner(new File("In.txt"));
            while (read.hasNext()){
                int value=read.nextInt();
                double sqrt=Math.round(Math.pow(value,1/3.0)*100)/100.0;
                printWriter2.println(String.format("∛%s=%s",value,sqrt));
            }
            printWriter2.close();
            read.close();
        });
        Fileworker.sqrt(() -> { //извлечение корня 4 степени
            Scanner read= new Scanner(new File("In.txt"));
            while (read.hasNext()){
                int value=read.nextInt();
                double sqrt=Math.round(Math.pow(value,1/4.0)*100)/100.0;
                printWriter3.println(String.format("∜%s=%s",value,sqrt));
            }
            printWriter3.close();
            read.close();
        });
    }
}

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import java.io.FileNotFoundException;

public class Fileworker {
    public static void sqrt(Fileable fileable) throws FileNotFoundException {
        fileable.sqrtable();
    }
}

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import java.io.FileNotFoundException;

public interface Fileable {
    void sqrtable() throws FileNotFoundException;
}