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CS156 HW4: Pangrams!                

Description                

The world seems to be filled with tired canines and springy vulpines!                 

For this assignment, you will write a program called pan.c that searches for pangrams, sentences that contain all 26 letters in the alphabet. It will search the file sentences, which will be assumed to contain one sentence per line. If the line is a pangram, display it, with its line number. At the end, display how many pangrams were found.                 

Sample Run                

Text like this is typed by the user.                 

“%” is the shell prompt and not a part of your program.                 

    % cat sentences 
    The quick brown fox jumps over a lazy dog

    Pack my box with five dozen liquor jugs.
    YbOvgEznjLcpisKrauqmXTDwFh
    Mr. John Oliver is 100% @*&^?!
    Now is the time for all good men to come to the aid of their country.
    The five boxing wizards jump quickly
    pi most assuredly does NOT equal 4294967295.8191999
    % c11 -Wall pan.c 
    % ./a.out
    1: The quick brown fox jumps over a lazy dog
    3: Pack my box with five dozen liquor jugs.
    4: YbOvgEznjLcpisKrauqmXTDwFh
    7: The five boxing wizards jump quickly
    4 pangrams found.
    % mv sentences sentences.save
    % date >sentences
    % ./a.out
    No pangrams found.

    export STACK_FRAME_LINK_OVERRIDE=ffff-ad921d60486366258809553a3db49a4a

Testing                

• This program reads a file called sentences in your current directory.
• You’d better put one there, then.
• Create it with an editor.

Requirements                

• The alphabet is abcdefghijklmnopqrstuvwxyz, or the upper-case versions thereof.
• Each line in sentences will be no longer than 80 characters. Don’t forget space for the terminating '\0'.
• Really, sentences don’t matter. It’s all about lines. Just look for all the letters in one line.
• If sentences, in the current directory, can’t be opened, complain to standard error and stop the program.
• If pangrams are found, display how many on standard output.
• If no pangrams are found, complain to standard error.
• All output should be exactly like the output shown above, given the same input.
• You must write comments in your code describing what the code is supposed to do, at the minimum:
  • a comment header at the very very very beginning containing your name, date, and purpose of your source file
  • a comment before each function, describing what it does
• No global variables. Global constants are ok.
• You must fclose any file that you fopen.
• Use char constants for char values, not int ASCII values: 'A', not 65.
• Use functions to break this up into smaller chunks of code. Don't put it all in main().

How to submit your homework:                

Use                 

    ~cs156/bin/checkin HW4 pan.c

How to receive negative points:                

Turn in someone else’s work.                 

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