File Input/Output - Chapter 13 Review questions p 445: # 1, 2, 3, 4, 11 Why must every file open have a close? What are some difficulties with file input that do not occur for file output? What are some difficulties with file input/output that do not occur with console input/output? Show how to open a file for input. Show how to open a file for output. Give code to write .... to a file. Give code to read .... from a file. Why is file input/output a useful tool? How do we test if a file was opened properly?