/*  vectorlab.cpp:  A study of STL's vector container
 *
 * ADD DOCUMENTATION HERE (as per the Programming Style Sheet)
 *************************************************************************/

#include <iostream>
#include <vector>
using namespace std;

template <typename T>
ostream & operator<<(ostream & out, const vector<T> & v)
{
   for (int i = 0; i < v.size(); i++)
      out << v[i] << "  ";
   return out;
}

int main()
{
   // Declare 6 vectors v1, v2, v3, v4, v5, v6 to illustrate the
   // various types of declarations (and constructors)
   vector<int> v1;
   vector<int> v2(2);
   int numInts;
   cout << "Enter capacity of v3: ";
   cin >> numInts;
   vector<int> v3(numInts);
   vector<int> v4(3, 99);
   // The preceding declaration should work, but it may not in some
   // versions of some compilers. The following is a work-around:
   // vector<int> v4(3);
   // for (int i = 0; i < 3; i++)  v4[i] = 99;
   //--- End of work-around

   int a[] = {1, 4, 9, 16, 25};
   vector<int> v5(a, a+5);
   vector<int> v6;

  //--- 1 --- Add:
  // Statements to display the capacity and size of each vector<int>
  // and whether it is empty


  //--- 2 --- Add:
  // Statements to display the maximum capacity of a vector<int>


  //--- 3 --- Add:
  // Statements to see the effect of the reserve() member function


  //--- 4 --- Add:
  // Output statements of the form   cout << vector-variable << endl;
  // to display the contents of each vector


  //--- 5 --- Add:
  // Statements to append 11 to v2 and then output v2's size and contents
  //               append 22 to v2 and then output v2's size and contents
  //               append 33 to v2 and then output v2's size and contents
  //               remove the last element of v2 and then output v2's size
  //                  and contents


  //--- 6 --- Statements to investigate how capacities grow
  // Add statements to append 111 to v1 and then output v1's capacity, size,
  // and contents

  //--- 7 --- Statements to investigate how capacities grow
  // Add statements to append 222, 333, 444, and 555 to v1 and output 
  // v1's capacity, size, and contents after each value is appended


  //--- 8 --- Statements to investigate how capacities grow
  // Remove the comment delimiters from the following:
/*
  int oldCapacity = v1.capacity();
  for (int i = v1.size() + 1; i <= 2500; i++)
  {
     v1.push_back(999);
     if (v1.capacity() == v1.size())
        cout << "\n*** For i = " << i << " v1 is full\n";
     if (v1.capacity() > oldCapacity)
     {
        cout << "For i = " << i << "  capacity increased from "
             << oldCapacity << " to " << v1.capacity() << endl;
        oldCapacity = v1.capacity();
     }
  }
*/

  //--- 9 --- Statements to see if element type affects how capacities grow
  // Add:
  //    A declaration of an empty vector<double> v0; 
  //    A loop like the preceding but with v1 replaced by v0 
  //
  // Then change double to char and run it again.


  //--- 10 --- Statements to see how initial capacity affects 
  //           how capacities grow

  // Uncomment the following line:
  // cout << "Initial capacity of v4 is " << v4.capacity() << endl;

  // Add a loop like that in 9 but output changes in v4's capacity


  //--- 11 --- Statements to access the ends of a vector

  // Uncomment the following line:
  // cout << "Original contents of v5: " << v5 << endl;

  // Add statements to:
  //    Output the first and last elements of v5
  //    Change the first element to 77 and the last element to 88
  //    Output the contents of v5


  //--- 12 --- Statements to demonstrate correct and incorrect
  //           use of the subscript operator
  // Add statements that try using the subscript operator to:
  //            change a value in v5
  //            append a value to v5
  //            append a value to v2
  //            append a value to empty vector v6


  //--- 13 --- Add statements that:
  //            assign v2 to v3
  //            check if they are equal
  //            check if v5 is less than v2
  //            swap contents of v5 and v2
  //            check if v5 is less than v2

}