IntelliJ - CLion : What should I do to use input text file?

Question

I want to read .txt file in my C/C++ project in CLion IDE.

I want to automate the command that I run in bash:

./<executable_file> < input.txt

I edited program parameter in Run/Debug configuration.

But it does not works.

Redirection is part of the *shell* not something that happens automatically when running a program. Maybe you should invoke a shell instead, that runs your program with the redirection? Or modify your program to handle command-line arguments? — Some programmer dude, Mar 15 '17 at 15:11
It appears this is not supported yet: https://youtrack.jetbrains.com/issue/CPP-3153 You may need to pass the file name as an argument string and let your application handle opening and reading from the file — 0x5453, Mar 15 '17 at 15:11

score 10 · Answer 1 · answered Aug 03 '20 at 17:39

If someone is still interested in this, at the current date, CLion has added this feature. Go Edit Configurations (top right corner toolbar, name of your project | Debug):

Now there is an option: "Redirect input from". Just click the folder and find your input file.

score 2 · Answer 2 · answered Feb 25 '20 at 18:59

2

It is not officially supported as of now, you can do the following.

If your input file is input.txt, you can use freopen to set stdin file as input.txt

freopen("input.txt","r",stdin);

if you want to do the same with your output:

freopen("output.txt","w",stdout);

this will work for std::cin (if using c++), printf, etc...

This will help you in debugging your code in clion

Similar Question CLion standard input while debugging

answered Feb 25 '20 at 18:59

Vishal Singh

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Worth to mention: don't forget to use the relative or absolute path in case you are using C/C++ Single File Execution plugin otherwise the compiler will generate an error. useful: https://programmersought.com/article/47212852083/ – Omar Fendri Jul 22 '21 at 22:21

score 0 · Answer 3 · edited Dec 04 '19 at 18:46

0

Not a direct solution but the alternative you can do using your command line.

g++ -Wall -ggdb filename.cpp -o filename

and run it using:

./filename < inputFile

Also, I don't think JetBrain has an official answer to this type of issue for Clion yet...

edited Dec 04 '19 at 18:46

Kevin

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answered Dec 04 '19 at 18:22

Tim Zhang

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IntelliJ - CLion : What should I do to use input text file?

3 Answers3