// Example 10.14. Example to read values into a matrix of car
// quantities interactively

#include <iostream>
#include <vector>

using namespace std;

void dump ( const vector< vector<int> >& m );

int main()
{
   const int NUM_MAKES = 3;                   // number of makes
   const int NUM_QUARTERS = 4;                // number of quarters

   vector< vector<int> > sales(NUM_MAKES);    // sales by make and quarter

   for ( int row = 0; row < NUM_MAKES; ++row) // resize the columns
	sales.at(row).resize(NUM_QUARTERS);

   for (int quarter = 0; quarter < NUM_QUARTERS; ++quarter)
   {
	cout << endl << "In Quarter #" << quarter + 1
             << ", give the number sold for" << endl;
	cout << "Lincoln: ";
	cin  >> sales.at(0).at(quarter);
	cout << "Ford:    ";
	cin  >> sales.at(1).at(quarter);
	cout << "Mercury: ";
	cin  >> sales.at(2).at(quarter);
   }

   cout << endl << "Car Sales:" << endl;
   dump(sales);

   return 0;
}

void dump ( const vector< vector<int> >& m )
{
	for ( int row = 0; row < m.size(); ++row) {
		for ( int col = 0; col < m.at(row).size(); ++col)
			cout << m.at(row).at(col) << "\t";
		cout << endl;
	}
}