base operand of `->' has non-pointer type
32 G:\代码\成对的字符串.cpp base operand of `->' has non-pointer type `std::map<int, int, std::less, std::allocator<std::pair > >' for(multimap<char,map >::iterator itor=test.begin();itor!=test.end();++itor) if(itor->second->fir