(∗2.5) Imagine that reading medium-long strings (most are 5 to 25 characters long) from cinis the bottleneck in your system. Write an input function that reads such strings as fast as you can think of. You can choose the interface to that function to optimize for speed rather than for convenience. Compare the result to your implementation's >> for strings.
(∗1.5) Write a function itos(int) that returns a stringrepresenting its intargument.