Write some software

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Project Description

I need you to develop some software for me. I would like this software to be developed for Windows using Java. This assignment is to alphabetically sort n strings, each with maximum-length of k = 21 characters. (You

may assume n ≤ 1000.) The algorithm to be used is LSD (Least-Significant-Digit-First) radixsort. The

algorithm must run in O(n) time, where one character operation takes one unit of time. You must handle

the strings on a character-by-character basis, one character at a time. (Each character operation takes

O(1) time.)

The strings consist of only upper-case letters A-Z, with no space. The strings need not be distinct. (For

example, there may be several PATEL in a class list!)

Each string has at most k characters. Shorter strings must be padded with blank characters (as they are

read from a file) to reach the fixed length of k.

First input the strings from a text file “[url removed, login to view]”. Assume that each string starts at the beginning of a new

line and ends with one or more white-space-characters. (An end-of-line character is a white-space.) Store

the strings in a two-dimesional array S with n rows and k columns. That is, string i is stored in S[i, 1..k].

For efficiency, once the strings have been read into array S, they must stay in that order and not be moved

during the sorting. Instead, we use a pointer array (array of string indices) P[0..n−1]. Initially, set P[i] = i

for all i. During the sorting, we move these indices. At the end of sorting, P[0] will be the index of the

string which is the first in the sorted order, P[1] the second string in the sorted order, and so on.

At the end, output the strings in sorted order to a text file “[url removed, login to view]”. Use the same format as the input file,

with each string as one line. (Each string must begin at the beginning of a line and end with an end-of-line


Notes on naming files: For ease of grading, your program must receive the names of input-file and

output-file from the command line. And these file names must have default names “[url removed, login to view]” and “[url removed, login to view]”,

respectively. Then the user will be able to either specify a file name, or decide to go with the default name.

That is, your program will first receive the name of input file.

Please specify the input file (default = [url removed, login to view] ):

After receiving the name of input file, your program will then receive the name of output file.

Please specify the output file (default = [url removed, login to view]):

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