class Hz;
class KHz;
 
class KHz
{
public: KHz(double val) {val_ = val;}
	operator double() const {return val_;}
	KHz operator*(double mult) {return val_ * mult;}
 
private:
	double val_;
};
 
class Hz
{
public:
	Hz(double val) {val_ = val;}
 
private:
	double val_;
};
 
// Would like to avoid this explicit conversion function:
Hz cnvKHzToHz(KHz khz) {return khz * 1000.0;}
 
void doSomething(KHz khz) {;}
 
int main()
{
	Hz ret = 0;
	KHz valkhz = 4.0;
	ret = cnvKHzToHz(3.0); // Would like to have a compiler ERROR to prevent double argument here
	ret = cnvKHzToHz(valkhz); // OK
 
	// doSomething(ret); // ERROR: "Cannot convert parameter 1 from 'Hz" to 'KHz'
}
 

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