1 files changed, 171 insertions, 0 deletions
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..9f85fa2
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,171 @@
+
+#include <iostream>
+#include <vector>
+#include <string>
+#include <map>
+#include <algorithm>
+#include <fstream>
+#include <set>
+
+using namespace std;
+
+
+vector<string> *getfilenames()
+{
+    vector<string> *books = new vector<string>(5);
+    cout << "Enter filenames for books (Q to quit)" << endl;
+
+    string inp;
+    cout << ">> ";
+    for (cin >> inp; inp != "Q"; cin >> inp) {
+        cout << ">> ";
+        books->push_back(string(inp));
+    }
+    return books;
+}
+
+bool invalidchar(char x) {return x < 'a' || x > 'z';}
+void normalize(string *st)
+{
+    transform(st->begin(), st->end(), st->begin(), ::tolower);
+    string::iterator end = remove_if(st->begin(), st->end(), invalidchar);
+    st->erase(end, st->end());
+}
+
+set<string> *readDictionary()
+{
+    ifstream file;
+    set<string> *dict = new set<string>();
+    string word;
+    file.open("dictionary.txt");
+    while (file.good()) {
+        file >> word;
+        normalize(&word);
+        dict->insert(string(word));
+    }
+    file.close();
+    return dict;
+}
+
+map<string,int> *readfiles(vector<string> *books)
+{
+    map<string,int> *frequency = new map<string,int>();
+
+    ifstream file;
+    string curword;
+    vector<string>::iterator it;
+    for(it = books->begin(); it < books->end(); it++) {
+        file.open(it->c_str());
+        while (file.good()) {
+            file >> curword;
+            normalize(&curword);
+            if (curword.size() != 0)
+                (*frequency)[string(curword)] += 1;
+        }
+        file.close();
+    }
+    return frequency;
+}
+
+int getUserChoice()
+{
+    int choice;
+    do {
+        cout << "Please pick an operation" << endl;
+        cout << "1: Show number of times a word occurs" << endl;
+        cout << "2: Show which words occur more than some number of times" << endl;
+        cout << "3: quit and show nonexistant words found in the books" << endl;
+        cout << ">> ";
+        cin >> choice;
+    } while(choice < 1 && choice >3);
+    return choice;
+}
+
+string *getUserWord()
+{
+    string *input = new string();
+    cout << "Enter a word: ";
+    cin >> *input;
+    normalize(input);
+    return input;
+}
+
+void examineSingleWord(map<string, int> *freqs)
+{
+    string *word = getUserWord();
+    int count = (*freqs)[*word];
+    cout << "The word \" " << *word << "\" occurs " << count << " times" << endl;
+    delete word;
+}
+
+int getUserCount()
+{
+    int input;
+    do {
+        cout << "Enter a number: ";
+        cin >> input;
+    } while (input <= 0);
+    return input;
+}
+
+void showWordsMoreFrequentThan(map<string,int> *freqs)
+{
+    int count = getUserCount();
+    map<string,int>::iterator it;
+    for (it = freqs->begin(); it != freqs->end(); it++)
+        if ((*it).second >= count)
+            cout << (*it).first << ": " << (*it).second << endl;
+}
+
+vector<string> *nonExistantWords(set<string> *keys, set<string> *dict)
+{
+    vector<string> *diff = new vector<string>();
+    set_difference(keys->begin(), keys->end(), dict->begin(), dict->end(),inserter(*diff, diff->begin()));
+    return diff;
+}
+
+void printUnrealWords(vector<string> *fakes)
+{
+    cout << "The following words were used in the books, but are not real" << endl;
+    vector<string>::iterator it;
+    for (it = fakes->begin(); it != fakes->end(); it++) {
+        cout << *it << endl;
+    }
+}
+
+set<string> *getKeys(map<string,int> *freqs)
+{
+    map<string,int>::iterator it;
+    set<string> *keys = new set<string>();
+    for (it = freqs->begin(); it != freqs->end(); it++) {
+        keys->insert((*it).first);
+    }
+    return keys;
+}
+
+int main(int argc, const char *argv[])
+{
+    set<string> *dict = readDictionary();
+    vector<string> *books = getfilenames();
+    map<string,int>::iterator it;
+    map<string,int> *freqs = readfiles(books);
+
+    int choice;
+    do {
+        choice = getUserChoice();
+        switch (choice) {
+            case 1: 
+                examineSingleWord(freqs);
+                break;
+            case 2:
+                showWordsMoreFrequentThan(freqs);
+                break;
+        }
+    } while(choice != 3);
+
+    set<string> *keys = getKeys(freqs);
+    vector<string> *fakes = nonExistantWords(keys, dict);
+    printUnrealWords(fakes);
+    cout << "There are " << fakes->size() << " nonreal words" << endl;
+    return 0;
+}