运行 ID: 41186

Main.cc: In function ‘int main()’:
Main.cc:8:2: error: expected ‘;’ before ‘for’
  for(int i=s.size()-1;i>=0;i--)
  ^~~
Main.cc:8:23: error: ‘i’ was not declared in this scope
  for(int i=s.size()-1;i>=0;i--)
                       ^