Problem 4. Write a C function good_echo() that reads a line of text of arbitrary length from the standard input and writes it to the standard output. In other words, the function should work no matter how many characters are typed before a newline character. Use fgets() to read the input and puts() to do the output. Use the man command to see how these standard library functions work (#include ). (Note: You may want to write a driver program to test your function code, but your answer should include only the code for good_echo.)