C++类向量问题
C++ class vector issues
好的，我正在开发这个库存程序，在这个程序中，应该发生的是用户输入关于特定产品的各种信息，然后将其传递给库存，同时让用户有机会更改东西（正如您在代码中看到的）。由于我这样做是为了一个学校项目，我必须有各种各样的课程（因此我没有摆脱它们）。
现在我的问题是库存类中的向量。
错误"std:：vector>AddProduceToInventory（std:：vector<_Ty，std:：allocater<_Ty>>）"：无法将参数1从"std：vector>"转换为"std:：vector>"
这个问题适用于类中的每个向量。我只复制了一个相同的错误。
我不知道还能做什么。这是我的代码（抱歉太长了！）
#include <iostream>
#include <string>
#include <vector>
#include <sstream>
using namespace std;
class Item {
public:
void SetPrice(int prcInDllrs) {
priceInDollars = prcInDllrs; // Somehow I need to keep adding each of these totals to make a grand total price.
}
void SetItemPrice(int whatever) {
itemsPrice = whatever;
}
void SetName(string nm)
{
name = nm;
};
void SetQuantity(int qnty)
{
quantity = qnty;
};
virtual void Print() //Here is my print problem
{
};
virtual ~Item()
{
return;
};
protected:
string name;
int quantity = 0;
int priceInDollars = 0;
int itemsPrice = 0;
};
class Produce : public Item { // Derived from Item class
public:
void SetExpiration(string expir)
{
expiration = expir;
};
void Print()
{
cout << name << " x" << quantity
<< " (Expires: " << expiration << ")" << " for $" << itemsPrice //FILL THIS IN!!!
<< endl;
};
private:
string expiration;
};
class Book : public Item {
public:
void SetAuthor(string athr) {
author = athr;
}
void Print()
{
cout << name << " x" << quantity
<< " for $" << itemsPrice << " (Author: " << author << ")" << endl;
}
private:
string author;
};
class Inventory {
public:
void PrintInventory()
{
if (inventory.size() == 0) {
cout << "No items to print." << endl;
}
else {
for (unsigned int i = 0; i < inventory.size(); ++i) {
cout << i << " - ";
inventory.at(i)->Print();
}
}
cout << "Total inventory value: $" << totalInvPriceInDollars << endl;
}
//I am leaving these out of the equation until I get the PrintInventory working
void AddItemToInventory()
{
vector<Inventory*> AddProduceToInventory(vector<Inventory*> Invntry);
AddProduceToInventory(vector<Inventory*> inventory)
{
Produce* prdc;
string usrInptName = "";
string usrInptQntyStr = "";
istringstream inSS;
int usrInptQnty = 0;
string usrInptExpr = "";
string usrInptPrcStr = "";
int usrInptPrc = 0;
int itemsTotalPrice = 0;
istringstream inDD;
string runningTotal = "";
int sum = 0;
cout << "Enter name of new produce: ";
getline(cin, usrInptName);
cout << "Enter quantity: ";
getline(cin, usrInptQntyStr);
inSS.str(usrInptQntyStr);
inSS >> usrInptQnty;
inSS.clear();
cout << "Enter expiration date: ";
getline(cin, usrInptExpr);
cout << "Enter the price per item: $";
getline(cin, usrInptPrcStr);
inDD.str(usrInptPrcStr);
inDD >> usrInptPrc;
inDD.clear();
itemsTotalPrice = usrInptPrc * usrInptQnty;
prdc = new Produce;
prdc->SetName(usrInptName);
prdc->SetQuantity(usrInptQnty);
prdc->SetExpiration(usrInptExpr);
prdc->SetPrice(usrInptPrc);
prdc->SetItemPrice(usrInptPrc);
inventory.push_back(prdc);
Inventory set;
set.SetInventory(inventory);
return inventory;
}
}
void AddBookToInventory()
{
vector<Inventory*> AddBookToInventory(vector<Inventory*> inventory) {
Book* prdct;
string usrInptName = "";
string usrInptQntyStr = "";
istringstream inSS;
int usrInptQnty = 0;
string usrInptAthr = "";
string usrInptPrcStr = "";
int usrInptPrc = 0;
int itemsTotalPrice = 0;
istringstream inDD;
string runningTotal = "";
int sum = 0;
cout << "Enter name of new book: ";
getline(cin, usrInptName);
cout << "Enter quantity: ";
getline(cin, usrInptQntyStr);
inSS.str(usrInptQntyStr);
inSS >> usrInptQnty;
inSS.clear();
cout << "Enter author: ";
getline(cin, usrInptAthr);
cout << "Enter the price per item: $";
getline(cin, usrInptPrcStr);
inDD.str(usrInptPrcStr);
inDD >> usrInptPrc;
inDD.clear();
prdct = new Book;
prdct->SetName(usrInptName);
prdct->SetQuantity(usrInptQnty);
prdct->SetPrice(usrInptPrc);
prdct->SetAuthor(usrInptAthr);
prdct->SetItemPrice(usrInptPrc);
inventory.push_back(prdct);
Inventory set;
set.SetInventory(inventory);
return inventory;
}
}
void UpdateItemQtyInventory()
{
//This is the update function in which we can change how many items a certain purchase has
vector<Item*> UpdateItemQtyInInventory(vector<Item*> inventory) {
string usrIndexChoiceStr = "";
unsigned int usrIndexChoice = 0;
istringstream inSS;
string usrInpuQntyStr = "";
int usrInptQnty = 0;
if (inventory.size() == 0) {
cout << "No items to update." << endl;
}
else {
PrintInventory(inventory);
do {
cout << "Update which item #: ";
getline(cin, usrIndexChoiceStr);
inSS.str(usrIndexChoiceStr);
inSS >> usrIndexChoice;
inSS.clear();
} while (!(usrIndexChoice < inventory.size()));
cout << "Enter new quantity: ";
std::getline(cin, usrInptQntyStr);
inSS.str(usrInptQntyStr);
inSS >> usrInptQnty;
inSS.clear();
inventory.at(usrIndexChoice)->SetQuantity(usrInptQnty);
}
return inventory;
}
}
void RemoveItemFromInventory()
{
//Here we will be removing an entire item from the inventory
vector<Item*> RemoveItemFromInventory(vector<Item*> inventory) {
istringstream inSS;
string usrIndexChoiceStr = "";
unsigned int usrIndexChoice = 0;
string usrInptQntyStr = "";
if (inventory.size() == 0) {
cout << "No items to remove." << endl;
}
else {
PrintInventory(inventory);
do {
cout << "Remove which item #: ";
getline(cin, usrIndexChoiceStr);
inSS.str(usrIndexChoiceStr);
inSS >> usrIndexChoice;
inSS.clear();
} while (!(usrIndexChoice < inventory.size()));
inventory.erase(inventory.begin() + usrIndexChoice);
}
return inventory;
}
}
void GetTotalValueAsPrice()
{
}
void SetInventory(vector<Item*> invntry) {
inventory = invntry;
}
private:
int totalInvPriceInDollars = 0;
vector<Inventory*> inventory;
};
// Print all items in the inventory
void PrintInventory(vector<Item*> inventory);
// Dialogue to create a new item, then add that item to the inventory
vector<Item*> AddItemToInventory(vector<Item*> inventory);
// Dialogue to create a new book, then add that book to the inventory
vector<Item*> AddBookToInventory(vector<Item*> inventory);
// Dialogue to update the quantity of an item, then update that item in the inventory
vector<Item*> UpdateItemQtyInInventory(vector<Item*> inventory);
// Dialogue to remove a specific item, then remove that specific item from the inventory
vector<Item*> RemoveItemFromInventory(vector<Item*> inventory);
int main() {
vector<Inventory*> inventory1;
string usrInptOptn = "default";
string usrInptOptn2 = "default";
Inventory update;
update.UpdateItemQtyInventory();
while (true) {
// Get user choice
cout << "nEnter (p)rint, (a)dd, (u)pdate, (r)emove, or (q)uit: ";
getline(cin, usrInptOptn);
// Process user choice
if (usrInptOptn.size() == 0) {
continue;
}
else if (usrInptOptn.at(0) == 'p') {
Inventory printer;
printer.PrintInventory();
update.SetInventory(inventory1);
}
else if (usrInptOptn.at(0) == 'a') {
cout << "nEnter (b)ook or (p)roduce: ";
getline(cin, usrInptOptn2);
if (usrInptOptn2.at(0) == 'b') {
inventory1 = AddBookToInventory(inventory1);
inventoryUpdate.SetInventory(inventory1);
}
else if (usrInptOptn2.at(0) == 'p') {
inventory1 = AddItemToInventory(inventory1);
inventoryUpdate.SetInventory(inventory1);
}
else
{
continue;
}
}
else if (usrInptOptn.at(0) == 'u') {
inventory1 = UpdateItemQtyInInventory(inventory1);
}
else if (usrInptOptn.at(0) == 'r') {
inventory1 = RemoveItemFromInventory(inventory1);
}
else if (usrInptOptn.at(0) == 'q') {
cout << "nGood bye." << endl;
break;
}
}
return 0;
}
我也收到了额外的错误，但我认为它们来自这个主要问题。我该怎么办才能解决这个问题？
谢谢！此外，我正在使用Visual Studio，但已经检查了Code:：Blocks，以确保这不是一个奇怪的编译器问题。
您的大多数函数看起来都类似于以下内容：
void foo() {
std::vector<T> foo(std::vector<T> bar){
/*...*/
}
}
看起来你试图在函数内部声明一个函数（具有相同的名称，但不同的参数和返回类型，有时还缺少返回类型）。只是不要那样做，而只是这样：
std::vector<T> foo(std::vector<T> bar){
/*...*/
}
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