This code performs the following actions: 1. **Defines a buffer:** A...

This code performs the following actions:

1. Defines a buffer: A character array doc of size 128 is declared to store a formatted string.

2. Forms a string using snprintf:

   • snprintf is a safer version of sprintf as it ensures that it does not write outside the bounds of the provided buffer (doc in this case).
   • The sizeof(doc) argument limits the number of characters that can be written into the doc array to the array's size (128).

3. Concatenates two strings with a ".txt" extension:

   • "%s%s.txt" is the format string for snprintf, which specifies how the final string should be constructed.
   • %s is a placeholder for a string, so snprintf will replace the placeholders with the values of the variables Cartella and nome, in that order.
   • The resulting string will be composed of Cartella followed by nome and then .txt.

4. Purpose: The resulting string will be copied into the doc array. Essentially, the code creates a file path or name by concatenating the value of Cartella, the value of nome, and the extension .txt, ensuring no more than 128 bytes are written, to avoid buffer overflows.

For example:

• If Cartella = "Documents/" and nome = "MyFile", then doc will contain "Documents/MyFile.txt".