////////////////////////////////////////////////////////////////// //////**************CHALLENGE:Deficient Numbers //////****************Author: Petros Simidyan ////***************** #include #include #define CLEAR std::cin.clear(); std::cin.ignore(1000, '\n') inline int sumOfDivider(const int& n) { int sum = 1; std::cout << "1 + "; for (int i = 2; i <= n / 2; i++) if (n%i == 0) { std::cout << i << " + "; sum += i; } std::cout << n; return sum + n; } inline bool isDeficient(const int n) { return sumOfDivider(n) < 2 * n; } inline void printDef(const int input) { std::cout << "Test for number " << input << std::endl; bool isDef = isDeficient(input); std::cout << (isDef ? "< " : ">= ") << "2*" << input << std::endl; std::cout << input << " is" << (isDef ? " " : " not"); std::cout << " a deficient number!" << std::endl; } inline void testInRange(const int input) { int testNum = 2; while (testNum <= input) printDef(testNum++); } int main() { int input = 0; while (true) { std::cout << "Please give an positiv even integer number greater or equal to 2!" << std::endl; if (std::cin.peek() == '-') {//making sure, that ght input an positiv integer is std::cout << "The given integers should be positiv!" << std::endl; CLEAR; } else { std::cin >> input; if (std::cin.fail()) {//check, that the input is an integer std::cout << "Wrong input!" << std::endl; std::cout << "Your input is eather not an integer" << std::endl; CLEAR; } else testInRange(input); } } return 0; }