#include <string.h>
#include <iostream>
//#include <array>

using namespace std;

//function prototypes
void get_sentence(char[], int);
int create_sentence(char*&);
void dyn_sent(char*&, char);

int main()
{
   //define local variables
   char sentence[20];
   char *sent2, *sent3;
   int length;
   char in;

   //create the second array based on user defined length
   length = create_sentence(sent2);

   //get the first two sentences 
   get_sentence(sentence, 20);
   get_sentence(sent2, length);
   
   //print the first two arrays
   cout << sentence << endl;
   cout << sent2 << endl;

   //delete arrays
   //delete[] sentence;
   //sent2 = NULL;
   delete[] sent2;
   
   //initialize the third array to one character
   sent3 = new char[1];

   //while the last charcter entered isnt new line, add the character to the array
   cout << "Enter the third sentence: ";
   do
   {
      cin.get(in);
      dyn_sent(sent3, in);
      //cout << sent3 << endl;
   }
   while(in != '\n');

   cout << sent3 << endl;

   //finish up deleting
   //sent3 = NULL;
   delete[] sent3;

   return 0;
}
 
void get_sentence(char s[], int size)
{
   cout << "Enter a string: "; 
   cin.getline(s, size);
}

int create_sentence(char *&sent)
{
   //cin.ignore();
   int size;
   cout << "How long of a sentence do you want?: ";
   cin >> size;
   cin.ignore();

   sent = new char[size];
   //sent = NULL;
   //delete[] sent;
   return size;
}

void dyn_sent(char *&sent, char in)
{
   int newSize = strlen(sent)+1;

   char *nextArray = new char[newSize];

   for(int i=0; i < strlen(sent); i++)
   {
      nextArray[i] = sent[i];
   }

   nextArray[newSize-1] = in;

   delete[] sent;
   //sent = new char[newSize];

   sent = nextArray;

   //this messes stuff up
   //delete[] nextArray;
}