#include #include using namespace std; // Function declarations // void fill_matrix(vector >&, vector &, int); void print_matrix(vector >&); void print_matrix_rev(vector >&); int main( ) { // Variables and containers // vector > matrix; vector row; int num; // Receive an integer from user and print // out that number's Floyd's triangle and // reverse Floyd's triangle. // cin >> num; fill_matrix(matrix, row, num); cout << "Floyd's triangle:\n"; print_matrix(matrix); cout << "\nReverse Floyd's triangle:\n"; print_matrix_rev(matrix); } // Fill the matrix // void fill_matrix(vector >& m, vector & r, int n) { int out = 1; for (int i=1; i <=n; i++) { for (int j=1; j<=i; j++) { r.push_back(out++); } m.push_back(r); r.clear(); } } // Print the matrix // void print_matrix(vector >& m) { for(auto beg = m.begin(); beg != m.end(); ++beg) { for(auto ceg = beg->begin(); ceg != beg->end(); ++ceg) { cout << *ceg << " "; } cout << endl; } } // Print the matrix reversed // void print_matrix_rev(vector >& m) { for(auto beg = m.rbegin(); beg != m.rend(); ++beg) { for(auto ceg = beg->rbegin(); ceg != beg->rend(); ++ceg) { cout << *ceg << " "; } cout << endl; } }

CC: Floyd's Triangle