Question

class Seller
{
private:
   float salestotal;     // run total of sales in dollars
   int lapTopSold;       // running total of lap top computers sold
   int deskTopSold;      // running total of desk top computers sold
   int tabletSold;       // running total of tablet computers sold
   string name;          // name of the seller
Seller::Seller(string newname)
{
   name = newname;
   salestotal = 0.0;
   lapTopSold = 0;
   deskTopSold = 0;
   tabletSold = 0;
}

bool Seller::SellerHasName ( string nameToSearch )
{
   if(name == nameToSearch)
      return true;
   else
      return false;
}
class SellerList
{
private:
   int num;  // current number of salespeople in the list
   Seller salespeople[MAX_SELLERS];
public:
   // default constructor to make an empty list 
   SellerList()
   {
      num = 0;
   }
   // member functions 

// If a salesperson with thisname is in the SellerList, this 
// function returns the associated index; otherwise, return NOT_FOUND. 
// Params: in
int Find ( string thisName );

void Add(string sellerName);

void Output(string sellerName);
};

int SellerList::Find(string thisName)
{
   for(int i = 0; i < MAX_SELLERS; i++)
      if(salespeople[i].SellerHasName(thisName))
         return i;
   return NOT_FOUND;
}

// Add a salesperson to the salespeople list IF the list is not full
// and if the list doesn't already contain the same name. 
void SellerList::Add(string sellerName)
{           
   Seller(sellerName);
   num++;
}

我的SellerList类中的函数中的参数存在一些问题。我想在salesperson数组中添加一个人，所以我记录了我的所有卖家...... Bob，Pam，Tim等...我的构造函数Seller（sellerName）创建了一个名为sellerName的卖家。

如何将此卖家添加到Salespeople数组，并具有将数据拉回并在更多功能（如更新功能或输出功能）中使用的方法？

MAX_SELLERS = 10 ....我想我的问题是不知道是否只使用参数添加（字符串）或添加（卖方，字符串）。任何帮助将不胜感激。

Answer 1

不重新发明轮子。选择适合您问题的容器。在这种情况下，由于您正在引用/ Seller std::string，我建议您使用哈希表，如std::unordered_map（或std::map搜索树无法访问C ++ 11）：

int main()
{
    std::unordered_map<Seller> sellers;

    //Add example:
    sellers["seller name string here"] = /* put a seller here */;

    //Search example:
    std::unordered_map<Seller>::iterator it_result = sellers.find( "seller name string here" );

    if( it_result != std::end( sellers ) )
        std::cout << "Seller found!" << std::endl;
    else
        std::cout << "Seller not found :(" << std::endl;
}

Answer 2

如何在SellerList中使用STD向量而不是数组。

vector<Seller> x;

您可以x.push_back(Seller(...))或x[0].SellerHasName()和x.size()为您提供卖家数量。

Answer 3

也许是这样的？

// Add a salesperson to the salespeople list IF the list is not full
// and if the list doesn't already contain the same name. 
void SellerList::Add(string sellerName)
{           
   if(num < MAX_SELLERS)
       salespeople[num++] = new Seller(sellerName);
}

声明我的成员函数参数/参数

3 个答案: