Считайте файл и записывайте его на вывод немедленно, байт за байтом, проверяя на конец файла и вычислительное время

---

Как мы можем это закодировать

The main method will:
Request the input file name.
Request the output file name.
Request the program "mode" (see below)
0 -- means the file(s) will be processed in character-by-character mode (see #2 below).
1 -- means the file(s) will be processed in line-by-line mode (see #3 below).
The character-by-character method will:
Open a simple text file.
Read the file and write it to output immediately, byte-by-byte, testing for the end of file marker.
Close the files.
Compute and display the wall-clock time (the "real-world" time) 
The line-by-line method will:
Open a simple text file (same file as 2 above) and an output file.
Read the file and write it to output immediately, line-by-line, testing for the end of file marker.
Close the files.
Compute and display the wall-clock time (the "real-world" time)
Run the program, use both modes. Compare the two results and explain the differences, if any. If none, explain why.

Что я уже пробовал:

The main method will:
Request the input file name.
Request the output file name.
Request the program "mode" (see below)
0 -- means the file(s) will be processed in character-by-character mode (see #2 below).
1 -- means the file(s) will be processed in line-by-line mode (see #3 below).
The character-by-character method will:
Open a simple text file.
Read the file and write it to output immediately, byte-by-byte, testing for the end of file marker.
Close the files.
Compute and display the wall-clock time (the "real-world" time) 
The line-by-line method will:
Open a simple text file (same file as 2 above) and an output file.
Read the file and write it to output immediately, line-by-line, testing for the end of file marker.
Close the files.
Compute and display the wall-clock time (the "real-world" time)
Run the program, use both modes. Compare the two results and explain the differences, if any. If none, explain why.

Мой вопрос заключается в том, куда я помещаю свои часы времени, а второй вопрос-как я открою этот файл в моем блоке else, потому что он дает мне ошибку компиляции.

---