无法从'std :: vector＆lt; _Ty＆gt;转换参数3 *'到'库存*'。为什么？

Question

#include "foodservice.h"
#include <iostream>
using namespace std;

int main() {
  Inventory Master;
  bool flag;
  Customer Bob("Bob", 12345, 100.00 );
  Customer Joe("Joe", 56789, 50.00 );
  Customer Arjun("Arjun", 98765, 00.01 );
  Customer Randy("Randy", 54689, 30.28);
  Customer Mark("Mark", 76598, 15.18);


  Master.firststock( "inventory.txt" );
  vector<Food> temp = Master._Inv;
  for(unsigned int i=0; i<temp.size(); i++ ) {
    cout << temp[i].name << " " << temp[i].quant << " " << temp[i].price << endl;
  }

  flag = Bob.addCart( "Apple" , 10,  &Master._Inv );
  Bob.report();
  flag = Bob.addCart( "Oranges", 2, &Master._Inv );
  flag = Bob.removeCart( "Apple", 3, &Master._Inv );
  flag = Arjun.addCart( "Apple", 1, &Master._Inv );
  flag = Bob.checkout(&Master._Inv);
  flag = Arjun.checkout(&Master._Inv);
  Master.summary();*/



  system("pause");

}

---

这是我头文件的一部分：

class Inventory;
class Customer {
  public:
    Customer(string n, int c, double b );
    ~Customer() { _Cart.clear(); };
    bool addCart( string name, int q, Inventory* inv );
    bool removeCart( Food f, int q, Inventory* inv );
    void report(); 
    bool checkout(Inventory* inv); 
  protected:
    string name;
    int card;
    double balance;
    CreditCard _CC(int c,double b);
    vector<Food> _Cart;
};


The error i am getting is: cannot convert parameter 3 from 'std::vector<_Ty> *' to 'Inventory *'
1>          with
1>          [
1>              _Ty=Food
1>          ]
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

我很感激帮助。因此，当我使用＆amp; Master._Inv时，错误显示出来。 _Inv是食物的载体，我在标题中的其他地方声明但未包括在内。然而问题出在指针和Master ......我也试过* Master._Inv但是也没用。

Answer 1

错误消息非常简单。 addCart，removeCart和checkout都指向Inventory作为参数。但是您的参数&Master._Inv是指向std::vector<Food>的指针。也许你的意思是&Master？

Answer 2

Customer :: addCart（）的第三个参数是一个指向Inventory对象的指针。尝试传递它和Master。