I downloaded this sketch and installed the required SDFat library like told in the sketch details explained.
But upon compilation I get several errors related to the not found fstream header like:
Atmega_Hex_Uploader_Fixed_Filename:930:3: error: 'ifstream' was not declared in this scope ifstream sdin (fName); ^~~~~~~~ Atmega_Hex_Uploader_Fixed_Filename:945:8: error: 'sdin' was not declared in this scope if (!sdin.is_open()) ^~~~
These lines are present in the "readHexFile" function.
I have no clue why this non modified code isn't compiling properly.