#include <iostream>
using namespace std;
class SmallInt
{
public:
/**
* implicit constructor
* ???int????????SamllInt????
*/
SmallInt(const int val): value(val)
{
cout << "SmallInt(const int val)" << endl;
}
/**
* class-type conversion
* ?????????????
* ???β?
* ????????????????
* ????????const????
*/
operator int()const /* SmallInt???????????????????int???? */
{
cout << "operator int()const" << endl;
return value;
}
int getValue() const
{
return value;
}
private:
int value;
};
void testTypeConversion()
{
SmallInt smallInt = 1;/* SmallInt smallInt = SmallInt(1) */
cout << smallInt.getValue() << endl;
cout << smallInt + 2 << endl;
}
void testTypeConversion2nd()
{
SmallInt smallInt = 3.14;/* 3.14????int???3 */
cout << smallInt.getValue() << endl;
cout << smallInt + 3.14 << endl; /* SmallInt??????????int????????double*/
}
int main()
{
testTypeConversion();
testTypeConversion2nd();
return 0;
}
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