How can I use cout << myclass

c++ class input integer
ali picture ali · Jun 5, 2010 · Viewed 52.6k times · Source

myclass is a C++ class written by me and when I write:

myclass x;
cout << x;

How do I output 10 or 20.2, like an integer or a float value?

Answer

Jerry Coffin picture Jerry Coffin · Jun 5, 2010

Typically by overloading operator<< for your class:

struct myclass { 
    int i;
};

std::ostream &operator<<(std::ostream &os, myclass const &m) { 
    return os << m.i;
}

int main() { 
    myclass x(10);

    std::cout << x;
    return 0;
}

Related questions

Private and Protected Members : C++

Can someone enlighten me as to the difference between private and protected members in classes? I understand from best practice conventions that variables and functions which are not called outside the class should be made private - but looking at …

Read More
How do you create a static class in C++?

How do you create a static class in C++? I should be able to do something like: cout << "bit 5 is " << BitParser::getBitAt(buffer, 5) << endl; Assuming I created the BitParser class. What would the BitParser …

Read More
When should you use a class vs a struct in C++?

In what scenarios is it better to use a struct vs a class in C++?

Read More