Question

我是c ++的新手，我正在尝试编写一个程序，使用main来调用单独编写的函数，我试图编写头文件声明的定义，我得到了一些函数的错误，我有在代码中标记

Store.hpp

#ifndef STORE_HPP

#define STORE_HPP
class Product;
class Customer;
#include<string>

#include "Customer.hpp"
#include "Product.hpp"
class Store

{

private:

std::vector<Product*> inventory;

std::vector<Customer*> members;


public:

void addProduct(Product* p);

void addMember(Customer* c);

Product* getProductFromID(std::string);

Customer* getMemberFromID(std::string);

void productSearch(std::string str);

void addProductToMemberCart(std::string pID, std::string mID);

void checkOutMember(std::string mID);

};

#endif

我无法编写该功能的代码帮助我

store.cpp

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

string id;

void Store::addProduct(Product* p)       //error 1 no matching function
{

    Product* p(std::string id, std::string t, std::string d, double p, int qa);
    inventory.push_back(p);
}

void Store:: addMember(Customer* c)
{
    members.push_back(c->getAccountID());
}

Product*  Store::getProductFromID(std::string id)
{
    for(int i = 0; i < inventory.size(); i++)
    {
        Product* p=inventory.at(i);
        if(p->getIdCode()= id)
        {
            return p;
        }
}
    return NULL;
}
Customer* Store:: getMemberFromID(std::string id)
{
    for(int i = 0; i < members.size(); i++)
    {
        Customer* c = members.at(i);
        if(c->getAccountID() == id)
        {

            return c;
        }
    }
    return NULL;
}
void std::Store productSearch(std::string str)
{
    for(int i = 0; i < inventory.size(); i++)
    {
        if(inventory[i] == str)
        {
            Product stud(inventory[i],inventory[i+1],inventory[i+2],inventory[i+3],inventory[i+4]);
cout<<getIdCode();

cout<<getTitle();

cout<<getDescription();

cout<<getPrice();

cout<<getQuantityAvailable();
        }
    }
}
void addProductToMemberCart(std::string pID, std::string mID)
{
    cout<<"adding to cart"<<endl;
    getMemberFromID(mID)->addProductToCart(pID);  

}

void checkOutMember(std::string mID)
{
    Customer* c=getAccountID(mID)
    mID=getMemberFromID(std::string mID);
    if(mID=="NULL")
    {
        cout<<mID<<"is not found"<<endl;
    }

}

customer.hpp

#ifndef CUSTOMER_HPP

#define CUSTOMER_HPP

#include<vector>

#include "Product.hpp"

class Customer

{

private:

std::vector<std::string> cart;

std::string name;

std::string accountID;

bool premiumMember;

public:

Customer(std::string n, std::string a, bool pm);

std::string getAccountID();

//std::vector getCart();

void addProductToCart(std::string);

bool isPremiumMember();

void emptyCart();

};

#endif

product.hpp

#ifndef PRODUCT_HPP

#define PRODUCT_HPP

#include<vector>

class Product

{

private:

std::string idCode;

std::string title;

std::string description;

double price;

int quantityAvailable;

public:

Product(std::string id, std::string t, std::string d, double p, int qa);

std::string getIdCode();

std::string getTitle();

std::string getDescription();

double getPrice();

int getQuantityAvailable();

void decreaseQuantity();

};

#endif

Answer 1

您编写的代码会发出大量警告和错误。如果你发现自己处于这种情况并且无法弄清楚其中一个是什么意思，那就试着修复其他一些。

您的主要问题在addProduct，但还有其他问题

using namespace std;

string id; //<---- what's this for?

void Store::addProduct(Product* p)       //error 1 no matching function
{

    //Product* p(std::string id, std::string t, std::string d, double p, int qa); 
    //<--- This line had the error and isn't needed
    inventory.push_back(p);
}

void Store::addMember(Customer* c)
{
//  members.push_back(c->getAccountID()); //<--- this errors too
    members.push_back(c);
}

Product*  Store::getProductFromID(std::string id)
{
    for (size_t i = 0; i < inventory.size(); i++)
    {
        Product* p = inventory.at(i);
        //if (p->getIdCode() = id) //<-- be careful with = and ==
        if (p->getIdCode() == id) //<---
        {
            return p;
        }
    }
    return NULL;
}

Customer* Store::getMemberFromID(std::string id)
{
    for (size_t i = 0; i < members.size(); i++)
    {
        Customer* c = members.at(i);
        if (c->getAccountID() == id)
        {
            return c;
        }
    }
    return NULL;
}

//void std::Store productSearch(std::string str) 
void Store::productSearch(std::string str) // <---- note this change too
{
    for (size_t i = 0; i < inventory.size(); i++)
    {
        //if (inventory[i] == str) //<<--------!
        if (inventory[i]->getDescription() == str)
        {
            //Product stud(inventory[i], inventory[i + 1], inventory[i + 2], inventory[i + 3], inventory[i + 4]); 
            // This is five Products from the inventory, not the i-th product in your invetory
            Product stud(*inventory[i]);//<---- I assume                
            cout << stud.getIdCode();
            cout << stud.getTitle();
            cout << stud.getDescription();
            cout << stud.getPrice();
            cout << stud.getQuantityAvailable();
        }
    }
}

void Store::addProductToMemberCart(std::string pID, std::string mID)//<--- note note std::Store addProductToMemberCart
{
    cout << "adding to cart" << endl;
    getMemberFromID(mID)->addProductToCart(pID);

}

void Store::checkOutMember(std::string mID)//<---
{
    //Customer* c = getAccountID(mID);//<<---?
        //mID = getMemberFromID(std::string mID);  //<---?
    Customer* c = getMemberFromID(mID); //Just this?
    if (c == NULL)//<---rather than "NULL" but nullptr might be better
    {             //  or not using pointers at all
        cout << mID << "is not found" << endl;
    }

}

没有匹配的呼叫功能

1 个答案: