Use the vi editor to write a C program on the Sun cluster that prompts the user for an input file name. The input file should contain words (text) in any format. A word is defined as any string of characters separated from other strings of characters by one or more blanks, tabs, or newlines. Your program should read the first 100 words from the file (or the entire file if it contains less than 100 words) into an array of strings. Your program should then sort the array of strings alphabetically, write the sorted array to the screen, find the word that appears the most times in the array, and write this word and the number of times it appears to the screen. If there is a tie for the most frequent word, your program should output the most frequent word that appears earliest in the array. If the input file is empty, your program should indicate this and not output any frequency count.

More detailed specifications include:

• The file ~taw2/pub/prog8.c gives an example of an array of strings, and shows how to swap two strings in such an array.
• Use separate functions for each of the following tasks: reading the file into the array, sorting the array, writing the array to the screen, and finding the most frequent word. For example, your code for sorting the array should NOT appear inside main().
• Strings can be compared (for sorting and counting frequency of appearance) using function strcmp from <string.h> (see Appendix B of the text).
• You must check that the input file is opened correctly.
• You may assume that no word in the input file contains more than 40 characters.
• To hand in:
  • Either turn in a print out of your source code, or email me (wahls@psu.edu) the file containing your source code. If you email me the program, I will email you your score and any comments on your program sometime after the due date. I will also save a copy of your program to prevent later disputes.
  • Your code will be graded on correctness, programming style, readability, the clarity of messages printed for the user and appropriate use of comments.

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