Can I read from a text file?

Question

Hello everyone

Can I open a text file in this online IDE and read from it and output the output to another text file?

Thanks!

Answer 1

Reading to or from a text file is possible. In C++, it can be done with ifstream/ofstream: http://www.cplusplus.com/doc/tutorial/files/ 

However, it depends on the language and IDE you are using. If the IDE allows you to import txt files to read from, then you should be able to pull info. from them.

Comments

This doesn't answer the question.

Answer 2

In order to read a file from a program you need to include it in the same project.  For example, you can have the data in data.txt and your code in myCode.  You can add additional files to your project using Ctrl + M.  When you list your projects, you will only be able to see the projects names but not the file they contain.  If you want to do so, you can download the project to your computer and unzip it.

Answer 3

Open file to read and another to write to. Read from first file and write contents into second file. Close the file.

Default path is file where scripts are held/where compiled from

FILE *ptr, *ptr1;

ptr = fopen("file name/path", "mode");

ptr1 = fopen("file name/path", "mode");

open and write to file etc

fclose("ptr"); //closes and saves file

fclose("ptr1"); //closes and saves file

Comments

What is the path used on this website?

Answer 4

Yes. I did this for you in python at https://onlinegdb.com/Cp84508o9:

File system:

.

  \ main.py

  \ YOUR_FILE

  \ OTHER_FILE

(Example) Your file's content:

A text file I uploaded to Online GDB.
Hello, World!

Main.py's content:

Finput = open('YOUR_FILE','r').read()
F = open('OTHER_FILE','a')
F.write(Finput)
F.close()
print(open('OTHER_FILE','r').read())

Output:

A text file I uploaded to Online GDB.
Hello, World!

:)

Comments

You can use the actual project link to see how to do it.