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search word in file

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Join Date: Dec 2007

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Tell Me

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Newbie Poster

search word in file

Dec 6th, 2007

Hi,

I want to ask if there function in library of c++ to search word in file ??

thank you

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Join Date: Aug 2007

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vmanes

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Posting Virtuoso

Re: search word in file

Dec 6th, 2007

Not that I know of. You have to read some (all) of the file, then search using any of several possible methods.

If you expand on your problem definition, and show the work you've done to solve it, you will get better help here.

Please read the forum rules.

Val

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Join Date: Sep 2004

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Narue

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Code Goddess

Re: search word in file

Dec 6th, 2007

>I want to ask if there function in library of c++ to search word in file ??
No. You need to break it down into smaller operations like reading a file and searching a string for a word. Then you can do this:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
std::ifstream in ( "myfile" );
 
if ( in ) {
  bool found = false;
  std::string search_for = "teapot";
  std::string word;
 
  while ( in>> word ) {
    if ( word == search_word ) {
      found = true;
      break;
    }
  }
 
  //...
}
std::ifstream in ( "myfile" );

if ( in ) {
  bool found = false;
  std::string search_for = "teapot";
  std::string word;

  while ( in>> word ) {
    if ( word == search_word ) {
      found = true;
      break;
    }
  }

  //...
}

Or this:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
std::ifstream in ( "myfile" );
 
if ( in ) {
  bool found = false;
  std::string search_for = "teapot";
  std::string line;
 
  while ( std::getline ( in, line ) ) {
    if ( word.find ( search_word ) != std::string::npos ) {
      found = true;
      break;
    }
  }
 
  //...
}
std::ifstream in ( "myfile" );

if ( in ) {
  bool found = false;
  std::string search_for = "teapot";
  std::string line;

  while ( std::getline ( in, line ) ) {
    if ( word.find ( search_word ) != std::string::npos ) {
      found = true;
      break;
    }
  }

  //...
}

For example.