/in/foo.cc: In function 'int main()':
/in/foo.cc:12:2: error: expected '(' before '{' token
  {
  ^
/in/foo.cc:15:2: error: 'else' without a previous 'if'
  else
  ^~~~
/in/foo.cc:18:10: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(a=10)cout<<"你不是VIP，不可查看答案"<<endl;
          ^