// File name: search.cpp
// Author: Xiannong Meng
// Course: CS2330
// Date: February 27, 1997
// Assignment: classroom discussion
// Problem statement: This program takes a word from user, searchs
//      through a file, if it is found, the line is listed.

#include <iostream.h>
#include <fstream.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>      // for getch()

#include "./cstring/cstring.h"

void hold()
{
  int c;
  while (!kbhit());
  c = getch();
}
void main(void)
{
   void SearchWord(String name, String w);
   String fileName;
   String word;

   cout << " type in a file name : ";
   cin >> fileName;
   cout << " type in a word to search : ";
   cin >> word;
   SearchWord(fileName,word);
   hold();
}

// Name : SerachWord
// Intent: search a word in a file
// Pre: a word and a file name is given
// Post: display the line if word is found
void SearchWord(String fName, String word)
{
   ifstream inF(fName.value());          // file to search
   char   oLine[160];
   String line;
   String compWord;
   int found = 0;
   int wLen = word.length();
   int start, end;

   if (!inF)
   {
      cerr << " file open failed \n";
      exit(1);
   }

   inF.getline(oLine,160,'\n');
   int compLen = strlen(oLine);
   while (inF && (found == 0))
   {
      cout << oLine << endl;
      start = 0;
      end   = wLen;
      compWord.assign(oLine,start,end);
     while ((compWord != word) && (end < compLen))
      {
	 start ++;
	 end ++;
	 compWord.assign(oLine,start,end-start);
     }
      if (compWord == word)
      {
	 found = 1;
	 cout << word << " is in " << oLine << endl;
      }
      else
	 inF.getline(oLine,160,'\n');
   }
}