DIY: Read N Characters Given Read4 II — Call Multiple Times
Understand how to implement a read function that reads n characters from a file by repeatedly using the read4 API. This lesson guides you in managing multiple calls and buffering to ensure accurate character reading from a file accessible only through read4.
We'll cover the following...
Problem statement
Suppose that you can only read a given $file using a specific API method called read4. You will implement the read method to read n characters from the $file. This read method can be called multiple times.
read4() API:
The read4() API reads the next four consecutive characters from the $file, until the $file no longer has any characters that need to be read. After reading, the read4() method writes the characters into the array named buff.
The read4() method uses its own file pointer to keep ...