// Rustam Zokirov // C++ program to Calculate Area and Circumference of Circle #include using namespace std; int main() { cout << "\t\tC++ program to Calculate Area and Circumference of Circle.\n"; float R, Area, Circumference; cout << "Please enter the Radius of Circle: "; cin >> R; if (R > 0) { Area = 3.14 * R * R; Circumference = 2 * 3.14 * R; cout << "Area of Circle is " << Area << ";" << endl; cout << "Circumference of Circle is " << Circumference << ";" << endl; } else { cout << "Negative numbers cannot be applied !!!" << endl; } system("pause"); return 0; }