C++ 7(成绩分等)

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 #include<iostream.h>
void main()
{
 double score=0.0;
 cout<<"please input a score:"<<endl;
 cin>>score;
 switch((int)(score/10))
 {
 case 10:
  cout<<"满分"<<endl;
  break;
 case 9:
  cout<<"优秀"<<endl;
  break;
 case 8:
  cout<<"良好"<<endl;
  break;
 case 7:
  cout<<"一般"<<endl;
  break;
 case 6:
  cout<<"及格"<<endl;
  break;
 default:
  cout<<"不及格"<<endl;
 }
}