#include<iostream>
using namespace std;
int main()
{
 float score;
 int a;
 cout<<"input score(o~100):";
 cin>>score;
 a=score/10;  //a的值为舍弃score的各位数后的值
 switch(a)
 {
     case 10:
     case 9:cout<<"excellent!"<<endl;
         break;
     case 8:cout<<"good!"endl;
         break;
     case 7:cout<<"right!"<<endl;
         break;
     case 6:cout<<"pass!"<<endl;
         break;
     default:cout<<"failed!"<<endl;
 }
 return 0;
}
哪错了呢   执行出来missing ';' before identifier 'endl'  

没想到还是那么粗心了，编程功底太差了。