Write a C++ program that searches for ``anagrams'' in a dictionary. An anagram is a word obtained by scrambling the letters of some string. For example, the word ``pot'' is an anagram of the string `"otp." Your solution must not use the keywords while, for, or goto or any STL algorithm functions. A sample run of the program is given below. Your output does not have to be formatted exactly the same as that shown in the sample, but should be in a similar style.

Sample Runs:

Here are two examples of how the program might work:

Please enter a string for an anagram: opt

Matching word opt

Matching word pot

Matching word top

Please enter a string for an anagram: blah

No matches found

Requirements:

You must write these three functions with the exact same function signature (include case):

int readDictionary(istream &dictfile, string dict[]);

Places each string in dictfile into the array dict. Returns the number of words read into dict. This number should not be larger than MAXDICTWORDS since that is the size of the array.

int recursivePermute(string word, const string dict[], int size, string results[]);

Places all the permutations of word, which are found in dict into results. Returns the number of matched words found. This number should not be larger than MAXRESULTS since that is the size of the array. The size is the number of words inside the dict array.

void recurPrint(const string results[], int size);

Prints size number of strings from results. The results can be printed in any order.

For words with double letters you may find that different permutations match the same word in the dictionary. For example, if you find all the permutations of the string kloo using the algorithm we've discussed you may find that the word look is found twice. The o's in kloo take turns in front. Your program should ensure that matches are unique, in other words, the results array returned from the recursivePermute function should have no duplicates. A nice way to test this, and your function in general, might be to use the assert facility from the standard library. If done properly the following code should run without a runtime error being generated.

string exampleDict[] = {"kool", "moe", "dee"};

int numResults = recursivePermute("look", exampleDict, 3, results);

assert(numResults == 1 && results[0] == "kool");

Again, your solution must not use the keywords while, for, or goto or any STL algorithm functions. You must not use global variables or variables declared with the keyword static, and you must not modify the function parameter lists. You must use the integer constants MAXRESULTS and MAXDICTWORDS, as the declared sizes of your arrays, as in the anagram.cpp example provided to you.