1번. #include using namespace std; class Rectangle { private: int width; int length; public: Rectangle(int x, int y); ~Rectangle(); void Input(int x,int y); void calArea(); }; Rectangle::Rectangle(int x, int y) :length(x), width(y) { } Rectangle::~Rectangle() { } void Rectangle::Input(int x, int y) { this->width = x; this->length = y; } void Rectangle::calArea() { int wide; wide = this->width * t..