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这一切都在头文件中，主要是它非常简单，我声明一个列表然后填充它，没有问题，并且可以从头文件中的另一个函数打印列表没有问题，但问题来了带有排序功能。它一直说它

严重性代码描述项目文件行抑制状态错误 C2664 'bool (Bike *,Bike *)'：
无法将参数 2 从 '_Value_type' 转换为 'Bike *' Project7 C:\Program Files (x86)\Microsoft Visual Studio\2019\社区\VC\Tools\MSVC\14.24.28314\include\xutility 1481

//the argument for the sort function

bool comp_id(Bike* b1, Bike* b2)
{
    return b1->id_num < b2->id_num;
}


//This is how I plan on sorting it.
// Also, side note can I do list<Bike> secondList = head; and then sort secondList.sort(comp_id)?

        head.sort(comp_id);
        for (auto iterator = head.begin(); iterator != head.end(); ++iterator)
        {
            cout << iterator->id_num << endl;
        }

//This is the Structure 

struct Bike
{
    char manufact[25];
    int id_num;
    status rented_code; //RENTED/NOT_RENTED
    char to_whom[25];   //to whom bike is rented
    int size;
    float cost_per_day;
    bool deleted;   //to mark bike as deleted in the list.
    Bike* next_manuf;   //pointer to next node in the
                //manufacturers list
    Bike* next_id;  //pointer to the next node
            //in the list by ID
    Bike* next; //pointer to the next node in the general list
};
4

1 回答 1

2

如果head是一个list<Bike>你的比较功能是错误的，它一定是

bool comp_id(Bike & b1, Bike & b2)
{
  return b1.id_num < b2.id_num;
}

或更好

bool comp_id(const Bike & b1, const Bike & b2)
{
  return b1.id_num < b2.id_num;
}

如果head是list<Bike *> ，您的比较功能就可以了

于 2020-04-20T20:57:19.093 回答