Open, search, act, close.

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10-13-2002
RoD

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.
10-13-2002
kuphryn

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

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

Kuphryn
10-13-2002
RoD

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.
10-13-2002
Sebastiani

Ok, I am going to chastise you a bit here. You have almost 700 posts here and ask these sorts of questions? You have to be diligent. Program day and night, trying everything you can possibly think of - don't let up or relax one bit! You must apply yourself constantly.
10-13-2002
Driveway

Yea, he just spams in General Discussions... :D
10-13-2002
RoD

Well i tried

http://www.cprogramming.com/tutorial/lesson10.html

but it has all kinds of errors. Its annoying to have absolutely no idea how to opena nd close files >_<
10-13-2002
Eibro

Post the errors
10-13-2002
RoD

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; }
10-13-2002
Eibro

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");
10-13-2002
RoD

Quote:

Uhhm, change that to a string.

This is going to sound like a rlly dumb question, but what do u mean.
10-13-2002
Eibro

What is c:\keywords.txt? What type of variable is it?
10-13-2002
RoD

The output is odd seeing as how it resembles nothing in the keywords.txt file...

Output:

╠╠╠╠╠╠╠╠╠╠╠╠░_↕Press any key to continue

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.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; //Should output 'this' b_file.close(); //Do not forget this! return 0; }
10-13-2002
Driveway

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; }