运行 ID: 2499

Main.cc: In function ‘int main()’:
Main.cc:7:7: error: ‘num’ was not declared in this scope
  cin>>num;
       ^~~
Main.cc:7:7: note: suggested alternative: ‘enum’
  cin>>num;
       ^~~
       enum
Main.cc:9:8: error: ‘a’ was not declared in this scope
   cin>>a[i];
        ^
Main.cc:10:12: error: ‘sum’ was not declared in this scope
   hd=sb[i]+sum;
            ^~~