#include<fstream>
#include<iostream>
#include<string>
#include<ctype.h>
using namespace std;

bool lineContainsWord(string line, string word)
{
	bool result = false;
	unsigned int indexOfWord = line.find(word);

	if(indexOfWord != string::npos)
	{
		//check begining or word
		if(indexOfWord == 0 || !isalpha(line[indexOfWord -1]))
		{
			int lengthOfWord = word.length();
			int lengthOfLine = line.length();
			//check begining or word
			if(indexOfWord + lengthOfWord == lengthOfLine || !isalpha(line[indexOfWord + lengthOfWord]))
			{
				result = true;
			}
		}
	}

	return result;
}
void main()
{
	ifstream bibleIn("bible.txt");
	ofstream bibleOut("love.txt");
	//bibleIn.open("bible.txt");

	string line;
	string word;
	cout << "Word to search for: ";
	cin >> word;

	//eof end of file, the char at the end of a file
	//file handle - variable used to work with files
	while(!bibleIn.eof())
	{
		getline(bibleIn,line);
		if(line.find("Book") != string::npos || lineContainsWord(line,word))
		{
			bibleOut << line << endl;
		}
	}

	bibleIn.close();
	bibleOut.close();
}