Question

这是.hpp文件的相关部分：

ifndef CUSTOMER_HPP
#define CUSTOMER_HPP

#include <vector>
#include "Product.hpp"

class Customer
{
private:
  std::vector<std::string> cart;
  //other random member variables

这是.cpp文件的相关部分：

#include "Customer.hpp"
#include "Product.hpp"
#include <iostream>
using namespace std;

Customer::Customer(string n, string a, bool pm){
    cart = new vector<string>;
    //other random member variables
}

完整错误是：

Customer.cpp:10:7: note: candidate is:
In file included from /usr/include/c++/4.8/vector:69:0,
             from Customer.hpp:4,
             from Customer.cpp:1:
/usr/include/c++/4.8/bits/vector.tcc:160:5: note: std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::basic_string<char>; _Alloc = std::allocator<std::basic_string<char> >]
 vector<_Tp, _Alloc>::
 ^
/usr/include/c++/4.8/bits/vector.tcc:160:5: note:   no known conversion for argument 1 from ‘std::vector<std::basic_string<char> >*’ to ‘const std::vector<std::basic_string<char> >&’

如果我删除该行 cart = new vector; 我尝试执行时遇到分段错误：

cart.push_back(random_string);

我怀疑是因为它尚未初始化。所以我在上面的行中添加了，现在出现了上述错误。

在。：/ / p>中调用cart.push_back（random_string）

void Customer::addProductToCart(string st){
   cout << "adding " << st << " to cart." << endl;
   getCart().push_back(st);
 }

传递给cart.push_back（）的参数来自

void Store::addProductToMemberCart(string pID, string mID){
    cout << "HIT in addProductToMemberCarti. pID = " << pID << ", mID = " << mID  << endl;   
    getMemberFromID(mID)->addProductToCart(pID);                                                                          }

在那里调用的getMemberFromID（）函数是：

 Customer* Store::getMemberFromID(string id){                                                                                

    for(int i = 0; i < members.size(); i++){                                                                          
       if(members.at(i)->getAccountID() == id){                                                                  
           return members.at(i);                                                                                           
         }                                                                                                                  
    }                                                                                                                       
    return NULL;                                                                                                         
}

Answer 1

你没有使用指针，所以这一行：

cart = new vector<string>;

错了。您无需初始化它。

参数1的已知转换从'std :: vector <std :: basic_string <char>＆gt; *'到'const std :: vector <std :: basic_string <char>＆gt;＆amp;'

1 个答案: