import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Scanner;

public class HeaderDiff {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter path to first header file: ");

String file1Path = scanner.nextLine();

System.out.print("Enter path to second header file: ");

String file2Path = scanner.nextLine();

try {

Map<String, Integer> headers1 = parseHeaders(file1Path);

Map<String, Integer> headers2 = parseHeaders(file2Path);

if (headers1.equals(headers2)) {

System.out.println("Header files are identical.");

} else {

System.out.println("Header files differ:");

printDifferences(headers1, headers2);

}

} catch (IOException e) {

System.err.println("Error reading files: " + e.getMessage());

} finally {

scanner.close();

}

}

// Parses header file and returns a map of header name to line number

private static Map<String, Integer> parseHeaders(String filePath) throws IOException {

Map<String, Integer> headers = new HashMap<>();

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {

String line;

int lineNumber = 0;

while ((line = reader.readLine()) != null) {

lineNumber++;

String trimmedLine = line.trim();

if (trimmedLine.startsWith("#include")) {

String headerName = trimmedLine.substring(9).trim(); // Extract header name

headers.put(headerName, lineNumber);

}

}

}

return headers;

}

// Prints the differences between the two header maps

private static void printDifferences(Map<String, Integer> headers1, Map<String, Integer> headers2) {

System.out.println(" Headers in file 1:");

for (Map.Entry<String, Integer> entry : headers1.entrySet()) {

System.out.println(" " + entry.getKey() + " at line " + entry.getValue());

}

System.out.println("\n Headers in file 2:");

for (Map.Entry<String, Integer> entry : headers2.entrySet()) {

System.out.println(" " + entry.getKey() + " at line " + entry.getValue());

}

}

}