// example.cpp
// Program to demonstrate ContainArray classes

#include <string>
#include <iostream>
#include "ContainArray.h"

using std::string;
using std::cout;
using std::endl;

using namespace ContainArray;

int main( void )
{
	// ContainArray provides 1-D, 2-D, and 3-D array classes; they can
	// be constructed by declaring their length in each dimension
	
	Vector<int> v1(3);      // vector with 3 rows
	Matrix<int> m1(2,3);    // matrix with 2 rows and 3 columns
	Tensor<int> t1(4,2,3);  // tensor with 4 rows, 2 columns, and 3 layers
	
	// We can optionally give an initial value for all elements
	
	Vector<double> v2( 3, 1.0 );   // vector filled with 1.0's
	Vector<string> v3( 3, "el" );  // vector filled with three el's
	
	// The elements can be accessed in several ways
	
	v1[0] = 1;     // with the [] operator
	v1(1) = 2;     // with the () operator
	v1.at(2) = 3;  // with the range-checking at() function
	
	// Matrix and Tensor elements are accessed with multiples of these
	// operators or with operators that take multiple indices
	
	m1[0][0]       = 11;  // first index is row, second index is column
	m1(0)(1)       = 12;  // the () operator is equivalent to []
	m1.at(0).at(2) = 13;  // each index range is checked with at()
	m1[1][0]       = 21;  // the [] operator accepts only one index
	m1(1,1)        = 22;  // the matrix () operator can take two indices
	m1.at(1,2)     = 23;  // as can the range-checking at() function
	
	// We can output these classes with the << operator
	
	cout << "v1 = " << v1 << endl;  // writes the size of the
	cout << "v2 = " << v2 << endl;  // vector followed by the
	cout << "v3 = " << v3 << endl;  // value of each element;
	cout << "m1 = " << m1 << endl;  // likewise for a matrix
	
	// A Matrix is actually a Vector of Vectors, so we can assign
	// a Vector to a row of a Matrix
	
	m1[0][0] = v1[0];  // the
	m1[0][1] = v1[1];  // long
	m1[0][2] = v1[2];  // way;
	m1[1] = v1;        // the short way
	cout << "m1 after assigning v1 to each row = " << m1 << endl;
	
	// Assigning a value to a Vector sets all elements to that value
	
	v1 = 5;
	cout << "v1 after setting all elements to 5 = " << v1 << endl;
	m1[0] = 5;
	cout << "m1 after setting the first row to 5 = " << m1 << endl;
	
	// Comparison operators are provided
	
	cout << "Row 0 of m1 " << ( m1[0] == v1 ? "equals" : "does not equal" );
	cout << " v1" << endl;
	cout << "Row 1 of m1 " << ( m1[1] != v1 ? "does not equal" : "equals" );
	cout << " v1" << endl;
	
	// Vectors, Matrixs, and Tensors of the same type can be swapped
	
	Vector<int> v4( 4, 7 );  // a vector of four elements, initialized to 7
	cout << "v1 = " << v1 << endl;
	cout << "v4 = " << v4 << endl;
	v1.swap(v4);
	cout << "Swapped v1 with v4" << endl;
	cout << "v1 = " << v1 << endl;
	cout << "v4 = " << v4 << endl;
	
	return 0;
}