import java.io$.$File;

import java.io$.$FileNotFoundException;

import java.util.Scanner;

public class TemperatureProcessor $\{$

$//$ this method converts a single Kelvin temperature to Celsius

private static double k$2$c$($double temp$)\{$

return temp $+$ Celsius.ZEROK$\_$IN$\_$CELSIUS;

$\}$

$//$ this method converts a single Celsius temperature to Kelvin

private static double c$2$k$($double temp$)\{$

return temp $-$ Celsius.ZEROK$\_$IN$\_$CELSIUS;

$\}$

$//$ this method converts a single Celsius temperature to Fahrenheit

private static double f$2$c$($double temp$)\{$

return $($temp $-32)*5/9$;

$\}$

$//$ this method converts a single Fahrenheit temperature to Celsius

private static double c$2$f$($double temp$)\{$

return temp $*9/5+32$;

$\}$

public static void main$($String$[]$ args$)\{$

System.out.println$("$This program processes temperature data from a file and reports statistics"$)$;

try $($Scanner$170$ input $=$ new Scanner$170($System$.$in$))\{$

System.out.print$("$Enter the name of the temperature file: $")$;

String fileName $=$ input.nextLine$()$;

Scanner$170$ fileScanner $=$ new Scanner$170($new File$($fileName$))$;

Celsius$[]$ temps $=$ new Celsius$[100]$;

int validTempCount $=$ readTemperatureFile$($fileScanner$,$ temps$)$;

printTemperatureData$($fileName$,$ temps, validTempCount$)$;

fileScanner.close$()$;

$\}$ catch $($FileNotFoundException e$)\{$

System.err.println$("$File not found. Please check the file name and try again."$)$;

$\}$

$\}$

public static int readTemperatureFile$($Scanner$170$ reader, Celsius$[]$ temps$)\{$

int count $=0$;

while $($reader$.$hasNextLine$()$ && count $<$ temps.length$)\{$

String line $=$ reader.nextLine$()$;

double celsiusTemp $=$ processTempLine$($line$)$;

if $($celsiusTemp $>=$ Celsius.ZEROK$\_$IN$\_$CELSIUS$)\{$

temps$[$count$++]=$ new Celsius$($celsiusTemp$)$;

$\}$

$\}$

return count;

$\}$

public static double processTempLine$($String line$)\{$

try $\{$

String$[]$ parts $=$ line.trim$().$split$("\backslash \backslash$s$+")$;

if $($parts$.$length $!=2)\{$

return Celsius.ZEROK$\_$IN$\_$CELSIUS $-1$;

$\}$

double value $=$ Double.parseDouble$($parts$[0])$;

String unit $=$ parts$[1].$toLowerCase$()$;

switch $($unit$)\{$

case $"$k$"$:

return k$2$c$($value$)$;

case $"$c$"$:

return value;

case $"$f$"$:

return f$2$c$($value$)$;

default:

return Celsius.ZEROK$\_$IN$\_$CELSIUS $-1$;

$\}$

$\}$ catch $($NumberFormatException e$)\{$

return Celsius.ZEROK$\_$IN$\_$CELSIUS $-1$;

$\}$

$\}$

public static void printTemperatureData$($String fileName, Celsius$[]$ temps, int count$)\{$

if $($count $==0)\{$

System.out.println$("$No valid temperatures found in this file: $"+$ fileName$)$;

return;

$\}$

double totalC $=0,$ totalK $=0,$ totalF $=0$;

int aboveAverageCount $=0$;

for $($int i $=0$; i $<$ count; i$++)\{$

double c $=$ temps$[$i$].$getC$()$;

totalC $+=$ c;

totalK $+=$ c$2$k$($c$)$;

totalF $+=$ c$2$f$($c$)$;

$\}$

double avgC $=$ totalC $/$ count;

double avgK $=$ totalK $/$ count;

double avgF $=$ totalF $/$ count;

for $($int i $=0$; i $<$ count; i$++)\{$

if $($temps$[$i$].$getC$()>$ avgC$)\{$

aboveAverageCount$++$;

$\}$

$\}$

System.out.println$("$Temperature data from the file: $"+$ fileName$)$;

System.out.printf$("$Average in Celsius: $\%\mathrm{.}2$f$\%$n$",$ avgC$)$;

System.out.printf$("$Average in Kelvin: $\%\mathrm{.}2$f$\%$n$",$ avgK$)$;

System.out.printf$("$Average in Fahrenheit: $\%\mathrm{.}2$f$\%$n$",$ avgF$)$;

System.out.println$("$Number of temperatures above average: $"+$ aboveAverageCount$)$;

$\}$

$\}$