Re: An kind of member function name scope specification

Stefan Ram wrote:
[snip oddly-formatted useless Account class]


Here's a simple example I just wrote that performs a clearly useful
encapsulation of the Fibonacci sequence. Any student can understand
the sequence, and how hiding the details simplifies the client code in
main(). The constructor performs an important function, and it shows
the use of const versus non-const. I felt that using operator
overloads (++ and operator ()) weren't appropriate. I took some
liberty with whitespace, showing how when something is short and
trivial, one might use fewer newlines.

    #include <iostream>
    
    class Fibonacci {
        int a, b;
    public:
        Fibonacci();
        int value() const { return a; }
        void next();
    };
    
    Fibonacci::Fibonacci() : a( 0 ), b( 1 ) { }
    
    void Fibonacci::next()
    {
        int fib = a + b;
        a = b;
        b = fib;
    }
    
    int main()
    {
        Fibonacci f;
        for ( int n = 10; n--; )
        {
            std::cout << f.value() << ',';
            f.next();
        }
        std::cout << '\n';
        return 0;
    }