MCS 275 homework #4 Due date: 19990402 D. J. Bernstein Exercise 7. Write a concatenate program that prints the contents of each file on its command line. For example, concatenate foo bar will open foo, print its contents, close it, open bar, print its contents, and close it. If a file is unopenable, print a warning message on stderr and go on to the next file. Exercise 8. Write a copy program that copies the first file listed on its command line to the second file listed on its command line. For example, copy foo bar will read characters from foo and write them to

bar.

If a file is unopenable, print a warning message on stderr and quit.