#include #include #include #include /* Kata 'rotation' - REVISED Given an array of size m and a number n, perform left rotations on the array for n times. m and n determined by user. E.g. input format: 5 4 1 2 3 4 5 Will cause array {1,2,3,4,5} to rotate left for 4 times, resulting in {5,1,2,3,4}. */ void rotation(int iteration, int size, int array[]) { for (int i = 0; i < iteration % size; i++) for (int j = 0; j < size - 1; j++) std::swap(array[j], array[j + 1]); } int main() { int iterations, array_size, iterator = 0; std::string array_elem; try { std::cin >> array_size >> iterations; if (std::cin.fail()) throw 1; if (array_size == 0) throw 2; std::cin.clear(); std::cin.ignore(512, '\n'); std::getline(std::cin, array_elem); if (array_elem.length() + 1 < array_size * 2) throw 3; int* array = new int[array_size]; std::cout << "Original array : "; for (int i = 0; i < array_size; i++) { std::string temp = ""; temp += array_elem[iterator]; array[i] = atoi(temp.c_str()); iterator += 2; std::cout << array[i] << " "; } std::cout << std::endl; rotation(iterations, array_size, array); std::cout << "Resultant array : "; for (int i = 0; i < array_size; i++) std::cout << array[i] << " "; } catch (int err_code) { switch (err_code) { case 1: std::cerr << "Invalid input."; break; case 2: std::cerr << "Cannot rotate 0 elements."; break; case 3: std::cerr << "Too little array elements provided."; break; default: std::cerr << "Unknown error."; } } return 0; }

Kata Challenge (rotation()) - [REVISED]