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Config file read from '=' sign

Apr 17th, 2009

Ok I need to know how to set my class to read only the values after the = sign.

Here's my class so far.

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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
 
class Config
{
	int pos;
	string search;
public:
	char * confname;
	void configsearch ()
	{
		fstream filename (confname);
		while (!filename.eof())
		{
badsearch:
			getline (filename,search);
		pos = search.find("#");
			if (pos != -1)
			{
				goto badsearch;
			}
			cout << search;
			pos = search.find("=");
			if (pos != -1)
			{
				cout << "\n" << pos;
			}
			cout << "\n";
		}
	};
};
#include <iostream>
#include <string>
#include <fstream>
using namespace std;

class Config
{
	int pos;
	string search;
public:
	char * confname;
	void configsearch ()
	{
		fstream filename (confname);
		while (!filename.eof())
		{
badsearch:
			getline (filename,search);
		pos = search.find("#");
			if (pos != -1)
			{
				goto badsearch;
			}
			cout << search;
			pos = search.find("=");
			if (pos != -1)
			{
				cout << "\n" << pos;
			}
			cout << "\n";
		}
	};
};

Last edited by kelechi96; Apr 17th, 2009 at 1:17 pm.

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unbeatable0 unbeatable0 is offline

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Re: Config file read from '=' sign

Apr 17th, 2009

Look at the code here:

if (pos != -1)
{
	goto badsearch;
}

I think you meant:

if (pos == -1)
{
	goto badsearch;
}

Another thing is that string::search() returns string::npos if the search function does not find what it was told to find, and not -1, so the code should be:

if (pos == string::npos)
{
	goto badsearch;
}
cout << search;
pos = search.find("=");
if (pos != string::npos)
{
	cout << "\n" << pos;
}

And one last thing: you can avoid using goto in your 'if' statement by replacing it with the statement continue; - this will jump to the beginning of the while loop:

if (pos == string::npos)
{
	continue;
}

Last edited by unbeatable0; Apr 17th, 2009 at 1:57 pm.

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jephthah

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Re: Config file read from '=' sign

Apr 17th, 2009

^ nice answer.

except one thing needs a bit stronger emphasis.

never, ever use "GOTO" this is not BASIC programming. You will be tarred and feathered.

(there may be an exception to the absolute ban on using GOTO, but that's not available until you reach Level 70.)

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Narue

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Re: Config file read from '=' sign

Apr 17th, 2009

>except one thing needs a bit stronger emphasis.
>never, ever use "GOTO" this is not BASIC programming.
Note to the OP: Avoid listening to programming advice that says you absolutely must or must not do something.

I'm here to prove you wrong.

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Re: Config file read from '=' sign

Apr 17th, 2009

my question still hasn't been awnsered i want to read from an equals sign in my configuration file how do i do that

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ArkM

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Re: Config file read from '=' sign

Apr 17th, 2009

•

Avoid listening to programming advice that says you absolutely must or must not do something.

Good metaprogramming advice

Never forget to declare C++ variables before...
To ignore or not to ignore?

Is it an advice or a requirement? Where is the border?...

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Narue

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Re: Config file read from '=' sign

Apr 17th, 2009

>Where is the border?...
Common sense, of course. Note that I said "avoid listening to" and not "never listen to".

The whole reason we have this "goto is teh EBIL!!!!!" crap is because a bunch of people were mindlessly following orders rather than thinking for themselves.

I'm here to prove you wrong.

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Re: Config file read from '=' sign

Apr 17th, 2009

A. Whats wrong with goto
B. still dosn't awnser my origonal question

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Narue

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Re: Config file read from '=' sign

Apr 17th, 2009

>A. Whats wrong with goto
Nothing. The problem is people using it in an undisciplined way such that the code becomes an unruly mess where control flow is difficult to follow.

>B. still dosn't awnser my origonal question
Be patient. When someone is ready to give you an answer, you'll get it. I notice you didn't even bother to thank unbeatable for taking the time to help you. Did you make the suggested changes?

I'm here to prove you wrong.

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