DIY: Read N Characters Given Read4 II — Call Multiple Times
Understand how to implement a Read method in C# that reads n characters from a file using the Read4 API. Learn to handle multiple calls to the method, manage internal buffers, and simulate file reading without direct access to the file. This lesson helps you tackle a common coding interview problem by building a solution that respects file reading constraints and improves your problem-solving skills.
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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 track ...