retriever% cc201 upper1.c
retriever% 

retriever% a.out
Enter a line:  The Quick brown FOX jumped over the lazy dog.
Old String: The Quick brown FOX jumped over the lazy dog.
New String: THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG.
retriever% 

retriever% a.out
Enter a line:  Yes! this is the best part of the trip...
Old String: Yes! this is the best part of the trip...
New String: YES! THIS IS THE BEST PART OF THE TRIP...
retriever%