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log cout? custom ostream? ideas?

 
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log cout? custom ostream? ideas?
okyup
6 Mar, 2007 - 10:24 PM
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Say I want to log all or most of the stuff that I'm displaying on the screen.

Is there any way to override cout and have it print to both a file and the screen? Or perhaps a custom ostream that does that?

Or any other method?

Thanks for ideas.
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gregoryH
RE: Log Cout? Custom Ostream? Ideas?
7 Mar, 2007 - 04:37 AM
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QUOTE(okyup @ 6 Mar, 2007 - 11:24 PM) *

Say I want to log all or most of the stuff that I'm displaying on the screen.

Is there any way to override cout and have it print to both a file and the screen? Or perhaps a custom ostream that does that?

Or any other method?

Thanks for ideas.

Hi

I think you areaksing about capturing the stream used by cout?

I seem to recall that there was a way to "sniff" the stream so you can send output to a file. you might want to sniff around MSDN on the topic of streams
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okyup
RE: Log Cout? Custom Ostream? Ideas?
7 Mar, 2007 - 12:14 PM
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Can't find any info on that.

Think I need a custom ostream after all. At least I have an opportunity to learn how to use them now. :x
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Amadeus
RE: Log Cout? Custom Ostream? Ideas?
7 Mar, 2007 - 12:28 PM
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Are you trying to write to both screen and file with a single command? If so, you can write a function/method that takes everything you need as a parameter, and performs both actions.
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ajwsurfer
RE: Log Cout? Custom Ostream? Ideas?
7 Mar, 2007 - 01:16 PM
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Checkout this page for an example of something simular:

http://www.java2s.com/Code/Cpp/Overload/Ov...eamoperator.htm
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okyup
RE: Log Cout? Custom Ostream? Ideas?
7 Mar, 2007 - 02:54 PM
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QUOTE(Amadeus @ 7 Mar, 2007 - 01:28 PM) *

Are you trying to write to both screen and file with a single command? If so, you can write a function/method that takes everything you need as a parameter, and performs both actions.
Yea that's what I was thinking. I like using insertion operator so much and hate printing with custom functions. crazy.gif That will be my backup strategy if custom ostream doesn't work out. ph34r.gif

QUOTE(ajwsurfer @ 7 Mar, 2007 - 02:16 PM) *

Checkout this page for an example of something simular:

http://www.java2s.com/Code/Cpp/Overload/Ov...eamoperator.htm
That is to send custom objects to the stream, not to change how the stream works. :-\ But thanks.
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okyup
RE: Log Cout? Custom Ostream? Ideas?
12 Mar, 2007 - 07:28 PM
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I figured I would do this:
CODE
#ifndef LOG_H
#define LOG_H

#include <string>
#include <vector>

using namespace std;

class log {
    private:
        vector<string> logfile;
        string type;
    public:
        log();
        log(const string&);
        string getFullLog();
        string getLastLog();
        const log& operator << (const string&);
        const log& operator << (const char*);
        const log& operator << (const int&);
        const log& operator << (const char&);
        const log& operator << (const float&);
};

#endif


Then log and cout at the same time like this:
CODE
log lout;
lout << "blah blah";


Does anyone know if it could be worked so this would work??
CODE
lout << "blah blah" << "hello world!" << "how are you today?";
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