I have created a program using the apmatrix class to declare 2 dimensional arrays. How could I declare 2d arrays using the vector header file or any other standard header. here is my code...if its needed, probably dont need the whole thing but if your curious.

Code:#include <iostream> #include <fstream> #include <iomanip> #include <apmatrix.h> #include <apvector.h> using namespace std; const int MAX = 4, FILL = 0; void getSquare (apmatrix <int> &); int sumRow (const apmatrix<int> &, int &); bool rowAdd (const apmatrix<int> &, int); bool columnAdd (const apmatrix<int> &, int); bool diagAdd (const apmatrix<int> &, int); bool unique (const apmatrix<int> &); void print (const apmatrix<int> &); main() { int row_sum; apmatrix <int> square(MAX, MAX); getSquare (square); sumRow (square, row_sum); if ( rowAdd (square, row_sum) && columnAdd (square, row_sum) && diagAdd (square, row_sum) && unique (square) ) { print (square); cout<< endl << "All rows, columns, and diagonals add up to: " << row_sum << endl; } else { print (square); cout<< endl << "Input is not a magic square..."; } return 0; } void getSquare (apmatrix <int> &array) //assign locations for the magic square, from a file { ifstream infile ("Lesson18.txt"); for (int row = FILL; row < MAX; row++) for (int col = FILL; col < MAX; col++) infile >> array[row][col]; } int sumRow (const apmatrix<int> &square, int &row) //calculate the sum of the first row { row = FILL; for (int col = FILL; col < MAX; col++) row += square[FILL][col]; return row; } bool rowAdd (const apmatrix<int> &square, int row_sum) //do all rows add up to row_sum? { int add = FILL; bool stop = FILL; for (int row = FILL; row < MAX; row++) { add = FILL; for (int col = FILL; col < MAX; col++) add += square[row][col]; if (add != row_sum) stop = true; } if (stop) return false; else return true; } bool columnAdd (const apmatrix<int> &square, int row_sum) //do all columns add up to row_sum? { int add = FILL; bool stop = FILL; for (int col = FILL; col < MAX; col++) { add = FILL; for (int row = FILL; row < MAX; row++) add += square[row][col]; if (add != row_sum) stop = true; } if (stop) return false; else return true; } bool diagAdd (const apmatrix<int> &square, int row_sum) //do all diagonals add up to row_sum? { int add = FILL; bool stop = FILL; for (int col = FILL; col < MAX; col++) //do first diagonal add += square[col][col]; if (add != row_sum) stop = true; add = FILL; //reset add for next calculation int row = MAX; //needs to start at max to find 2nd diagonal for (int col = FILL; col < MAX; col++) //do second diagonal { row--; add += square[row][col]; } if (add != row_sum) stop = true; if (stop) return false; else return true; } bool unique (const apmatrix<int> &square) //is each number different, within the correct range? { const int VECTOR_MAX = MAX * MAX + 1; apvector<int> countNum (VECTOR_MAX, FILL); int singlenum; bool stop = FILL; for (int row = FILL; row < MAX; row++) for (int col = FILL; col < MAX; col++) { singlenum = square[row][col]; countNum[singlenum]++; } for (int start = FILL + 1; start < VECTOR_MAX; start++) if ((countNum[start] == FILL) || (countNum[start] > 1)) stop = true; if (stop) return false; else return true; } void print (const apmatrix<int> &array) //print 2d array to the screen { for (int row = FILL; row < MAX; row++) { for (int col = FILL; col < MAX; col++) cout<< setw(4) << array[row][col]; cout<< endl; } } /*************************** OUTPUT: 16 3 2 13 5 10 11 8 9 6 7 12 4 15 14 1 All rows, columns, and diagonals add up to: 34 **************************** 16 3 2 13 5 11 10 8 9 7 7 12 4 15 15 1 Input is not a magic square... ***************************/