//   
// Example 11.6. This program reads sentences and displays
// the number of words. It also splits sentences before each
// verb and later splits before each connector. The verb or   
// connector must be in a list. A sentence must end in a 
// period. Any punctuation immediately follows a word.   
//    
   
#include "sentence.h"   
   
int main(void)   
{            
   void directions(void);  // prototypes  
   boolean_t ProcessMore(void);
   void DisplaySplitWords(const char [][MAX_LENGTH + 1], int);   

   const char verbs[][MAX_LENGTH + 1] =      // list of verbs
   {   
      "eat", "eats", "ate",   
      "run", "runs", "ran",   
      "sleep", "sleeps", "slept",   
      "laugh", "laughs", "laughed",   
      "am", "are", "is", "was", "were"   
   }; 
   
   const char connectors[][MAX_LENGTH + 1] = // list of connectors 
   {   
      "and", "but", "or"   
   };

   int NumVerbs = sizeof(verbs)/(MAX_LENGTH + 1),
       NumConnectors = sizeof(connectors)/(MAX_LENGTH + 1);
       
   directions();      
   SentenceAnalyzer sent; // sentence analyzer object
   do   
   {   
      sent.ReadSentence();
      cout << "Number of words in sentence = "
           << sent.NumSentenceWords() << "\n\n";
           
      cout << "List of verbs:\n";    
      DisplaySplitWords(verbs, NumVerbs);
      cout << "\nSentence split before verbs:\n";
      sent.SplitSentence(verbs, NumVerbs);
         
      cout << "List of connectors:\n";    
      DisplaySplitWords(connectors, NumConnectors);
      cout << "\nSentence split before connectors:\n";
      sent.SplitSentence(connectors, NumConnectors);   
   }   
   while (ProcessMore());   

   return 0;
}   
   
//   
// Function to print program directions   
// Pre:  none   
// Post: Directions were displayed.   
//    
   
void directions(void)   
{   
   cout << "This program reads sentences and displays the\n";
   cout << "number of words, the sentence split at each verb,\n";
   cout << "and the sentence split at each connector.\n"; 
   cout << "A sentence must end in a period.\n";
   cout << "Any punctuation immediately follows a word.\n";
}   
     
//   
// Function to determine if the user wishes to process more   
// sentences and to return an answer, TRUE or FALSE   
// Pre:  none   
// Post: TRUE was returned if the user wishes to process    
//       more, FALSE otherwise.   
//    
   
boolean_t ProcessMore(void)   
{      
   char answer[MAX_LINE];   // continue? 
      
   do   
   {   
      cout << "Would you like to process another sentence? (y/n): ";
      cin.getline(answer, MAX_LINE);   
   }   
   while (answer[0] != 'y' && answer[0] != 'Y' &&   
          answer[0] != 'n' && answer[0] != 'N');   
         
   return (tolower(answer[0]) == 'y');   
}   

//   
// Function to print an array of strings left-justified, 5 across   
// Pre:  words is an array of strings.
//       NumSplitWords is the number of strings in words.
// Post: The strings in words have been printed.   
//    
   
void DisplaySplitWords(const char words[][MAX_LENGTH + 1], 
      int NumSplitWords)
{   
   cout.setf(ios::left, ios::adjustfield);
   for(int i = 0; i < NumSplitWords; i++)   
   {   
      cout << setw(12) << words[i];
      if ((i % 5 == 4) || (i == NumSplitWords - 1))
         cout << endl;
   }   
}