[Dev-C++] Re: [Dev-C++]

[Luigi S. <gi...@li...>]

At 22.51 05/07/01 +0000, you wrote:
>hi everyone, i hope someone can help me. at the moment i am writing a 
>program, heres what i want it to do:
>
>i want it to open a text document that i have created and i want it to 
>search for '$$$$$' (after this there is some text i want). i then want it 
>to read the text that follows.
>...
>_________________________________________________________________________

Ian -
I hope that the following example code is of help

test.cpp
---------
// test the look_for function

#include <fstream.h>
#include "lookfor.h"

int
main(int argc, char **argv)
{
    if (argc != 3)
       cerr << "usage: " << *argv << " file key\n";

    else
    {
       const char *fname = argv[1];
       ifstream file(fname); // open the text file
       string key = argv[2];

       cout << "key is   : \"" << key << "\"\n";

       if (look_for(file, key)) // load the value
       {
          string val;
          file >> val;
          cout << "value is : \"" << val << "\"\n";
       }
       else
          cout << "sorry key not found in \"" << fname << "\"\n";
    }

   return 0;
}


lookfor.h
------------
#ifndef lookfor_h
#define lookfor_h

#include <iostream>
#include <string>

// look_for = look for the key on the stream is, return true if found

bool
look_for(istream &is, const string &key);

#endif


lookfor.cpp
---------------
#include "lookfor.h"

bool
look_for(istream &is, const string &key)
{
    bool found = false;
    string s;

    while (!found && is >> s)
       found = (s == key);

    return found;
}


here is the test data

test.dat
----------
file to be used as input for "test"
key_1: $$$$$ value_1
key_2: &&&&& value_2
...

try the following commands:
test test.dat $$$$$
test test.dat $$$$

---
gisan