#include <iostream>

using namespace std;

class MyClass
{
private:
    bool done;
    double x;
    double result;

public:
    MyClass();
    virtual ~MyClass() {}

    void set(double x);
    void print();
    void run();
};

MyClass::MyClass()
{
    this->x = 0;
    this->done = false;
}

void MyClass::set(double x)
{
    this->x = x;
}

void MyClass::print()
{
    if (this->done) {
        std::cout << "Result: " << this->result << std::endl;
    } else {
        std::cout << "First execute method run();" << std::endl;
    }
}

void MyClass::run()
{
    this->result = (this->x + 100) / 10;
    this->done = true;
}

int main()
{
    MyClass myClass;
    myClass.set(10);
    myClass.run();
    myClass.print();

    getchar();
    return 0;
}