operator short () const;

[pan2008]

这个怎么理解
operator short () const;

[feixue3000]

重载short关键字，const代表本函数不会修改任何数值。

[feixue3000]

here is a test:
class A
{
public:
char c;
operator short ()const{return c;}
};


int main(int argc, char *argv[])
{
A a1,a2;
a1.c = 'd';
a2.c = 'G';
cout << a1.c << a2.c << endl;;
short s1 = a1;
cout << s1 << endl;;
s1 += a2;
cout << s1 << endl;;
system("PAUSE");
return 0;
}