Implementing a rudimentary save system

[TastEPlasma]

Greetings,

So I have been messing around again with c++ after my life settled the hell down.

I am writing a text based adventure game (yes, really ), and I want to store the text is seperate notepad files for easy reference and editing.

Here is what I have:

void story (string stf)
{
    string line;
    string stftxt = ".txt";
    stftxt.insert(0,stf);
    ifstream storyfile;
    storyfile.open (stftxt);
    if (storyfile.is_open())
    {
        while (! storyfile.eof() )
        {
            getline (storyfile, line);
            cout << line << endl;
        }
        storyfile.close();
    }
    else cout << "Unable to open file";
}

What I cant figure out is how to open a file based on the number I pass to the function via string stf. Originally I was trying to convert int stf into a string and insert it into stftxt, until I realized that I had no good reason to leave it an integer and not make it a string.

Anyways, how do I dynamically open different files depending on a value passed to the function "story"? Any ideas would be most helpful.

Thanks,
TastEPlasma

EDIT: Aww hell, I originally started to type this about a rudimentary save system, but I finally figured all that out (how to read/write arrays to a .txt file). Cant change the threads title now though. :-(

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Last edited by TastEPlasma; October 14th, 2009 at 00:16.. Reason: Screwed up thread title

[Dax]

Originally Posted by TastEPlasma

Greetings,

...

Can't you just use another string parameter in the function declaration, that would be your dynamic file? ...Or did I miss the point, here?

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[TastEPlasma]

Unfortunately not. The primary problem is that I cant use a variable with the function file.open.

i.e. This is valid:

 storyfile.open ("story.txt");

This is not:

 storyfile.open (story);

Regardless of the variable type that story is.

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[Dax]

Why not? Do you get an error? Or is it buggy?

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[TastEPlasma]

I do get an error, it refuses to compile. I think it is a syntax error.

"cannot convert parameter 1 from 'std::string' to 'const wchar_t *'"

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[cooliscool]

Originally Posted by TastEPlasma

I do get an error, it refuses to compile. I think it is a syntax error.

"cannot convert parameter 1 from 'std::string' to 'const wchar_t *'"

Try this:

storyfile.open (story.c_str());

string.c_str will convert the string to a null terminated array of chars, with the return value being a pointer to this array. Should be what you need.

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[TastEPlasma]

Absolutely awesome.

c_str - C++ Reference

Link for info.

Thank you so much, this has been plaguing me for a couple of hours now.

It works now. :-DDD

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[cooliscool]

Originally Posted by TastEPlasma

Absolutely awesome.

c_str - C++ Reference

Link for info.

Thank you so much, this has been plaguing me for a couple of hours now.

It works now. :-DDD

No problem. Looking forward to your future progress.

Oh, and good to see you around after all these years. Not many of us original members left.

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[TastEPlasma]

My aim is primarily just to familiarize myself with the data management techniques of OO programming (which, so far, I am loving). I have several progressively grander projects in mind, but I got a lot of basic knowledge to grasp first.

I am thinking about making this project modular, since I am halfway there anyway, so if someone wanted they could just write the text files and a single text-based control file that would give the events a flowchart. I figure this is good practice since I am continuing to subdivide the data and function into successively smaller, cleaner pieces.

I also want my future projects to be modular as well, so its good practice in that sense too.

As for the older members, there is a certain feeling of warmth and nostalgia to see people still kickin around after all these years, eh?

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His: *c2d 6320 (1.86) @ 3.3Ghz *2GB OCZ flex DDR2-800 4-4-5-15 @ 950 *BFG 8800GTX @ 632core, 2000mem *SB Audigy SE *eVGA 680i (122-CK-NF63-TR) *700W OCZ GXS *400GB WD sata2 *SBC DSL ISP *Samsung 226bw *Nautilus 500 water cooling system on gpu, cpu, and mem