How to find out the size of a text file in bytes?

Question

C++ / C#

Hello! The question arose, you need to find the size of the file, after entering its contents. For example, the program prompts you to enter the contents of a file, the user enters text, and the program shows the size of the file. I tried using the filesize(),filelenght() functions, but that didn't work. Writes that such function is indefinite. Therefore, I ask for your advice to solve this problem.

Answer 1

man 3 ftell

Answer 2

For venda: CreateFile() + GetFileSize(), works. Infa 146%. And in your code, try closing the file after writing data to it.