Error while using __int64 ...

[kpoan]

#include<iostream.h>
typedef __int64 fprint_t;
main()
{
fprint_t one = ((fprint_t) 1) << 63;
cout<<one;
}

While trying to run this program i got the following error..


error C2593: 'operator <<' is ambiguous

Any body help me...?