package com.company;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;

public class Main {
    public static void ReadFromFile(int[][] Matrixx, String FName, int Row, int Col) throws
            Exception {
        String line;
        String[] Numb;
        BufferedReader buff = new BufferedReader(new FileReader(FName));
        for (int i = 0; i <= Row; i++) {
            line = buff.readLine();
            Numb = line.split(" ");
            for (int j = 0; j <= Col; j++) {
                Matrixx[i][j] = Integer.parseInt(Numb[j]);
            }
        }
        buff.close();
    }

    public static int SizeOfMatrix(String fileName) throws Exception {
        Boolean isFirst = true, isCorrect = true;
        int columnCount = 0, rowCount = 1;
        String line;
        String[] stringRow;

        BufferedReader reader = new BufferedReader(new FileReader(fileName));
        line = reader.readLine();
        while (line != null && isCorrect) {
            stringRow = line.split(" ");
            rowCount++;

            if (isFirst) {
                columnCount = stringRow.length;
                isFirst = false;
            }

            if (!isFirst && stringRow.length != columnCount) {
                isCorrect = false;
            }
            line = reader.readLine();
        }

        if (isCorrect && columnCount == rowCount) {
            return columnCount;
        }
        return 0;
    }

    public static int MatrixRowSize(String FName) throws Exception {
        int count = 0;
        FileReader MyFile = new FileReader(FName);
        BufferedReader buff = new BufferedReader(MyFile);
        while (buff.readLine() != null) {
            count++;
        }
        MyFile.close();
        return (count);
    }

    public static int MatrixColSize(String FName) throws Exception {
        String line;
        String[] Numb;
        int count = 0;
        FileReader MyFile = new FileReader(FName);
        BufferedReader buff = new BufferedReader(MyFile);
        line = buff.readLine();
        Numb = line.split(" ");
        for (int i = 0; i < Numb.length; i++)
            count++;
        MyFile.close();
        return (count);
    }

    public static void WriteToFile(float Arr[], String FName, int Row, int Col) throws Exception {
        FileWriter FileOut = new FileWriter(FName);
        for (int i = 0; i <= Row; i++) {
            FileOut.write(Arr[i] + "   ");
        }
        FileOut.write("\n");
        FileOut.close();
        System.out.println("Saved to file: " + FName);
    }

    public static float[] Average(int[][] Matrixx, int Col, int Row) {
        float Sum, Amount;
        float[] Arr = new float[Col];
        for (int i = 0; i < Row; i++) {
            Sum = 0;
            Amount = 0;
            for (int j = 0; j < Col; j++) {
                if (Matrixx[j][i] > 0) {
                    Sum += Matrixx[j][i];
                    Amount += 1;
                }
                Arr[i] = Sum / Amount;
            }

        }
        return Arr;
    }

    public static void AverageOutput(int[] Arr) {
        float avg;
        for (int i = 0; i < Arr.length; i++){
            System.out.printf("%.4f ", Arr[i]);
        }
    }

    public static void MatrixOutput(int[][] Matrixx, int Row, int Col){
        for (int i = 0; i <= Row; i++) {
            for (int j = 0; j <= Col; j++) {
                System.out.printf("%d   ", Matrixx[i][j]);
            }
            System.out.println();
        }
        System.out.println();
    }

    public static void main (String[]args) throws Exception {
        int[][] Matrixx;
        float[] Arr;
        int Rows, Cols;
        String FileNameIn, FileNameOut;
        Rows = MatrixRowSize(FileNameIn);
        Cols = MatrixColSize(FileNameIn);
        Matrixx = new int[Rows][Cols];
        Rows--;
        Cols--;
        ReadFromFile(Matrixx, FileNameIn, Rows, Cols);
        System.out.println();
        System.out.println("Given matrix::");
        MatrixOutput(Matrixx, Rows, Cols);
        Arr = Average;
        System.out.println("The result after addition:");
        WriteToFile(Matrixx, FileNameOut, Rows, Cols);
    }
}