#include <iostream>
 
class Library {
 
public:
	enum options {
        OPTION1, OPTION2, OPTION3
    };
    Library(unsigned long time, char color, options option);
 
private:
    options userOption;
};
 
Library::Library(unsigned long time, char color, options option) {
    userOption = option;
}
 
 
 
int OPTION1 = 123;
 
//Library go(1000, 8, OPTION1); // error: invalid conversion from ‘int’ to ‘Library::options’
Library go(1000, 8, Library::OPTION1); // no error
 
int main()
{
	printf("%d %d", OPTION1, Library::OPTION1);
 
	return 0;
}

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