CS253 HW2: Reading multiple files                

Description                

Write a C++ program called mf.cc (for multi-file) that behaves as stats.cc from HW1, except that it reads from several files given as arguments, not from standard input.                 

Sample Runs                

Here are several sample runs. “%” is my prompt:                 

    % g++ -Wall mf.cc 
    % cat a
    This is "test data" for HW2.
    Don't <ignore> it!
    % cat b
    Wed Jan  4 14:53:50 MST 2017
    % ./a.out a
    Control: 2
    Letter: 31
    Number: 1
    Punctuation: 5
    Symbol: 2
    Space: 7
    % ./a.out b
    Control: 1
    Letter: 9
    Number: 11
    Punctuation: 2
    Symbol: 0
    Space: 6
    % ./a.out a b
    Control: 3
    Letter: 40
    Number: 12
    Punctuation: 7
    Symbol: 2
    Space: 13

Requirements                

The requirements are the same as those for HW1, plus:                 

• Any positive number of files may be given as arguments.
• If no files are given as arguments, emit a usage message to standard error, including the program name. Then the program must stop, without displaying the summary.
• If a file can’t be read, complain to standard error, including the program name and the offending filename. Then the program must stop, without displaying the summary.
• Do not assume that the program name is a.out. We might compile it differently.
• I will not provide exact wording for the error messages. They must make sense to the TA.

Ask                

If you have any questions about the requirements, ask. In the real world, your programming tasks will almost always be vague and incompletely specified. Same here.                 

How to submit your homework:                

Use web checkin, or Linux checkin:                 

    ~cs253/bin/checkin HW2 mf.cc

How to receive negative points:                

Turn in someone else’s work.