C++第四章课后练习题4-22

#include <iostream>
using namespace std;
enum weekday{sunday,monday,tuesday,wednesday,thursday,friday,saturday
}; 
int main()
{
    int i;
    weekday d=thursday;
    cout<<"d="<<d<<endl;
    i=d;
    cout<<"i="<<i<<endl;
    d=(weekday) 6;
    cout<<"d="<<d<<endl;
    d=weekday(4);
    cout<<"d="<<d<<endl;
}