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.

Ezra

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? – Trudeau

It appears this is not supported yet: 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 – Arela

Answer 1

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.

Universal

Answer 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

Selfrenunciation

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: programmersought.com/article/47212852083 – Hist

Answer 3

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...

Desultory