Thread: Open, search, act, close.

Ok heres the idea, i have two text files. I want the program to open them both, check for a match from the users input in the first file, if its found i want it to go to the matching id number in the second file, then output the entire line from the second file. All i know is i need to us if.stream()??

Example:

Both files opened.

User enters: Hi how are you today.

Program scans first file for hi, how, are, you, and today.

it finds this line:

2 how,are,you

it then searches the second file for the line

2 I am fine, thank you for asking.

and outputs: I am fine, thank you for asking.

You will use functions including open(), read() or getline().

You already have the algorithm laid out. Just implement it.

Kuphryn

ok, where might i find the syntax for these? I don't want to sound lazy, i'd look but i don't really know WHAT i'm looking for, as i've never done this before.

Yea, he just spams in General Discussions...

Post the errors

Let me first say that the filepath is not in " " because when it is it tells me \k (part of the path) is not a valid escape sequence.

PHP Code:

--------------------Configuration: test - Win32 Debug--------------------
Compiling...
test.cpp
C:\Documents and Settings\NEKEY\Desktop\test.cpp(15) : error C2065: 'c' : undeclared identifier
C:\Documents and Settings\NEKEY\Desktop\test.cpp(15) : error C2143: syntax error : missing ')' before ':'
C:\Documents and Settings\NEKEY\Desktop\test.cpp(15) : error C2448: '<Unknown>' : function-style initializer appears to be a function definition
C:\Documents and Settings\NEKEY\Desktop\test.cpp(15) : error C2017: illegal escape sequence
C:\Documents and Settings\NEKEY\Desktop\test.cpp(15) : error C2059: syntax error : ')'
C:\Documents and Settings\NEKEY\Desktop\test.cpp(19) : error C2065: 'a_file' : undeclared identifier
C:\Documents and Settings\NEKEY\Desktop\test.cpp(19) : error C2297: '<<' : illegal, right operand has type 'char [45]'
C:\Documents and Settings\NEKEY\Desktop\test.cpp(23) : error C2228: left of '.close' must have class/struct/union type
C:\Documents and Settings\NEKEY\Desktop\test.cpp(27) : warning C4129: 'k' : unrecognized character escape sequence
Error executing cl.exe.

test.obj - 8 error(s), 1 warning(s) 


Code:

#include <fstream.h>

#include <iostream.h>



int main()

{

  char str[10];  

         //Used later

  ofstream a_file(c:\keywords.txt);

			//Creates an instance of ofstream, and opens example.txt

  a_file<<"This text will now be inside of keywords.txt"; 

			//Outputs to example.txt through a_file

  a_file.close();                           

			//Closes up the file

  ifstream b_file(c:\keywords.txt); 

			//Opens for reading the file

  b_file>>str;    

             //Reads one string from the file

  cout<<str;   

           

  b_file.close();    

           //Do not forget this! 

  return 0;

}

ofstream a_file(c:\keywords.txt);

Uhhm, change that to a string.
Also, you need to use double front slashes, or use a single back slash.
ofstream a_file("c:\\keywords.txt");

Uhhm, change that to a string.

This is going to sound like a rlly dumb question, but what do u mean.

What is c:\keywords.txt? What type of variable is it?

Code:

#include <fstream.h>

#include <iostream>

using namespace std;

int main()

{

  char str[10];  
  ofstream a_file;
  a_file.open("C:\keywords.txt");
  //you don't do anything here, why even have an a_file? Oh well..
  a_file.close();                           	
   ifstream b_file;
  b_file.open("C:\keywords.txt");
  b_file.getline(str, 10, '\n');//reads 10 characters from a file, or until a line break.
//this method reads spaces too, yours doesn't...
  cout<<str;   
  b_file.close();        
  return 0;
}