求大佬指教

不要总是浏览啊，看看哪里错了，求求了

作者：英语yyds 链接：https://ac.nowcoder.com/discuss/1092067?type=101&order=0&pos=6&page=1&channel=-1&source_id=1 来源：牛客网 #include<iostream> using namespace std; int main() {     int a,b,c,sum,n,count;     a=b=c=0;     sum=0;     do     {         cin>>n;         count++;         switch(n)         {             case 1:                 a++;                 break;             case 2:                 b++;                 break;             case 3:                 c++;                 break;         }while(n!=-1);         sum=a+b+c;         count/=2;         cout<<"A="<<a<<endl;         cout<<"B="<<b<<endl;         cout<<"C="<<c<<endl;         cout<<"Tot="<<sum<<endl;         if(a>count)             cout<<"A-yes"<<endl;         else             if(b>count)                 cout<<"B-yes"<<endl;         else             if(c>count)                 cout<<"C-yes"<<endl;         else             cout<<"all-NO"<<endl;         return 0; 是这个