Why does my program run all the way through normally, but throw 'std out_of_range' once its done? | Together C & C++ | Page 1

olive sonnet Dec 4, 2022, 6:15 PM

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Hi,
So I am a little confused about why my program is running the way it is right now. I just made a helper function that looks for stop words, and if it does find one... it removes that stop word.

Well, the program seems to run through completely and take out every stop word, but for some reason once it gets to the end it throws a out_of_range error! Does anyone know why this might be? I have a feeling it is because it goes past the last line and that throws the error? but im not sure... any advice would be appreciated :)

here is my function:

//helper function that only outputs non helper words
    string strStop(string str) {
        string text;


        ifstream file;
        file.open("stop.txt");

        while (getline(file, text)) {

            while (str.find("text") != string::npos) {

                str.replace(str.find(text), str.length(), "");
            }
        }
        return str;
    }```

and here is my error:
```terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::replace: __pos (which is 4294967295) > this->size() (which is 32)```

How do I fix this?

warm pierBOT Dec 4, 2022, 6:15 PM

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When your question is answered use !solved to mark the question as resolved.

Remember to ask specific questions, provide necessary details, and reduce your question to its simplest form. For tips on how to ask a good question run !howto ask.

cedar sparrow Dec 4, 2022, 6:20 PM

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Run it under a debugger so it shows you where that happened and can inspect that values of the various variables.

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Also str.find("text") should probably be str.find(text).

olive sonnet Dec 4, 2022, 6:32 PM

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how do i use a debugger? i am using vscode right now

cedar sparrow Dec 4, 2022, 6:35 PM

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Ideally you click this and it just works:

olive sonnet Dec 4, 2022, 6:37 PM

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hmm... when i press it, it just does this

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and the debug anyway option just doesnt work haha

cedar sparrow Dec 4, 2022, 6:38 PM

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I'm not sure. I don't use VSC for C++.

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Something something install the correct plugins and have the correct launch options.

olive sonnet Dec 4, 2022, 6:42 PM

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ugh i hate how complex launch options can be

worthy violet Dec 4, 2022, 6:51 PM

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https://cpp-doge.github.io/inferno/vscode-mingw/

worthy violet Dec 4, 2022, 6:58 PM

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olive sonnet ugh i hate how complex launch options can be

if you are on Windows then Visual Studio will probably be much simpler than VSCode

olive sonnet Dec 4, 2022, 7:25 PM

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worthy violet if you are on Windows then Visual Studio will probably be much simpler than VSCo...

okay, i got visual studio installed now

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but now how do i run my programs in it?

cedar sparrow Dec 4, 2022, 7:26 PM

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You open the project and press F5.

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Make sure to open the project, not just a file.

worthy violet Dec 4, 2022, 7:27 PM

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https://learn.microsoft.com/en-us/cpp/build/vscpp-step-1-create?view=msvc-170

Create a C++ console app project

Create a Hello World console app using Microsoft C++ in Visual Studio.

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https://learn.microsoft.com/en-us/cpp/build/vscpp-step-2-build?view=msvc-170

Build and run a C++ console app project

Build and run a Hello World console app in Visual C++

olive sonnet Dec 4, 2022, 7:28 PM

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so what do i do if i only have files and not a project?

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should i just make a project and put my files in it?

worthy violet Dec 4, 2022, 7:28 PM

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yes

olive sonnet Dec 4, 2022, 7:33 PM

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okay, i think im slowly getting it figured out. it is saying that i can't open a source file even though it is in the folder. why is that?

worthy violet Dec 4, 2022, 7:39 PM

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🤷

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vs is easy but not zero effort

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frankly just start over from scratch and manually copy paste your old code over from VSCode

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right click all the things

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https://tenor.com/view/all-the-things-hyperbole-and-a-half-do-all-the-things-excited-gif-16018689

Tenor

olive sonnet Dec 4, 2022, 7:41 PM

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yeah i did, i just am having problems since i have more than one file, and for some reason my main.cpp file isn't finding the other files on vs

worthy violet Dec 4, 2022, 7:41 PM

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it really shouldn’t be too difficult to figure out

worthy violet Dec 4, 2022, 7:42 PM

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olive sonnet yeah i did, i just am having problems since i have more than one file, and for s...

create more new files

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copy paste

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also I would re emphasize

worthy violet Dec 4, 2022, 7:43 PM

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worthy violet right click all the things

.

olive sonnet Dec 4, 2022, 7:44 PM

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what does it mean cryingmichaeljordan

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bruh

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okay also now everything is working and runs

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its now saying (process 7896) exited with code 0. To automatically close the console when debugging stops, enable Tools->Options->Debugging->Automatically close the console when debugging stops. Press any key to close this window . . .

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instead of showing me the output... im so confused lmao i just wanna know why it goes out of range

cedar sparrow Dec 4, 2022, 7:46 PM

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It's saying the program completed successfully. There was no out of range error.

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And it's telling you how to keep the console open after the program closes if you care to see the output.

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Alternatively press CTRL+F5 which runs it without the debugger and without closing the console.

olive sonnet Dec 4, 2022, 7:48 PM

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why isn't it showing an output of my program? and why doesn't it say there is an out of range error, if i didn't change anything from vscode to vs?

cedar sparrow Dec 4, 2022, 7:49 PM

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Because by default it doesn't keep the console open and I guess now they keep that setting because people are used to it.

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And my best guess why the out of range error is gone is that Visual Studio uses the build directory as the current working directory, so it failed to find stop.txt

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Use an absolute path or set the current working directory to where the file is.

olive sonnet Dec 4, 2022, 7:53 PM

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is there a setting or something i can do to keep the console open? but that would make sense. i set the absolute path but it is still saying it exited with code 0

cedar sparrow Dec 4, 2022, 7:54 PM

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Dude, it literally told you how to do it in the message you posted.

olive sonnet Dec 4, 2022, 7:55 PM

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bruh

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thats to close the console when its done

olive sonnet Dec 4, 2022, 7:56 PM

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cedar sparrow Dude, it literally told you how to do it in the message you posted.

i thought you were saying there was a command to see what my program is actually outputting, which it doesn't show in the message i posted

fresh oak Dec 4, 2022, 8:23 PM

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worthy violet https://cpp-doge.github.io/inferno/vscode-mingw/

sick design, is this yours?

worthy violet Dec 4, 2022, 8:24 PM

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thanks, yes it is

worthy violet Dec 4, 2022, 8:28 PM

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olive sonnet i thought you were saying there was a command to see what my program is actually...

there's not really "a command" for that, no. for a console app, VS will open a console to run your program. the console should be automatically set to stay open by default after your program ends, so anything you send to cout should end up in that console

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older versions of VS did not set the "stay open" option by default, but newer ones should

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I recommend trying the default console app starter project template. like create a new one, don't change it, and just click the "Play" button (green triangle), you should get a console that stays open and says "Hello World"

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that way you can confirm it does what you want, then you can investigate why your project is behaving differently

warm pierBOT Dec 5, 2022, 8:46 AM

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This question thread is being automatically closed. If your question is not answered feel free to bump the post or re-ask. Take a look at !howto ask for tips on improving your question.

#Why does my program run all the way through normally, but throw 'std out_of_range' once its done?