Whats function of this class?

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Whats function of this class?

Postby ramverma » Wed Oct 21, 2015 4:21 pm

While reading some tutorial on template, i stumbled upon a class which was used as a float later while declaring template class object, but couldn't understand why its needed, if any one could explain.

class Number {
float f;
Number(float ff = 0.0f) : f(ff) {}
Number& operator=(const Number& n) {
f = n.f;
return *this;
operator float() const { return f; }
friend ostream&
operator<<(ostream& os, const Number& x) {
return os << x.f;

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