void look(){
System.out.println("名字、状态");
for( int i = 0;i<dvdcount;i++);
{
if (a[i].i==1)
System.out.println(a[i].name+":可借");
else if (a[i].i==0)
System.out.println(a[i].name+":已借出，借出日期\t"+a[i].outdate);
}returnM();