C++循环一个菜单，直到选择了所有选项
C++ Iterating a menu until all choices have been selected
我正在为一个c++类做最后一个项目。我的程序是一个盘点控制台应用程序。到目前为止，我已经能够让程序完全按照预期运行，通过项目下的每个项目和每个尺寸。我在程序中添加了一个菜单，让员工可以选择他们想要盘点的项目。我希望这个菜单一直显示，直到所有选项（项目）都被"考虑在内"。我做了一个切换案例，它有效，但它不会遍历所有项目，而是只遍历选定的单个项目。如何使菜单循环，直到所有项目都已入账？（因为这是在零售店盘点的要点）这是我的代码：
//Name: Abdul Tabel
//Inventory program
#include <iostream>
#include <iomanip>
#include <string>
#include <cstring>
#include <fstream>
#include <cstdlib>
using namespace std;
// clothing item class declaration
class Item
{
private:
double small;
double medium;
double large;
public:
void setSmall(double);
void setMedium(double);
void setLarge(double);
double getRem() const;
double getSmall() const;
double getMedium() const;
double getLarge() const;
double allRem() const;
};
//menu function
void showMenu()
{
cout << "Please choose an item from the menu to do inventory forn Only choose each item one time!";
cout << "nType 'A' for Shirts";
cout << "nType 'B' for Pants";
cout << "nType 'C' Shoes";
cout << "nType 'D' to quit the program" << endl;
}
//assign value to small item
void Item::setSmall(double null)
{
small = null;
}
//assign value to medium item
void Item::setMedium(double null)
{
medium = null;
}
//assign value to large item
void Item::setLarge(double null)
{
large = null;
}
//gets value from small variable
double Item::getSmall() const
{
return small;
}
//gets value from medium variable
double Item::getMedium() const
{
return medium;
}
//gets value from large variable
double Item::getLarge() const
{
return large;
}
//gets total of reamining items
double Item::allRem() const
{
return small + medium + large;
}
int main()
{
Item shirt;
Item pants;
Item shoes;
double number;
double totalRemaining;
char selection;
// constants for menu choice
const char choice_a = 'A',
choice_b = 'B',
choice_c = 'C',
quit_choice = 'D';
// set output format
cout << fixed << showpoint << setprecision(2);
//show menu
showMenu();
cin >> selection;
switch (selection) // respond to the user's menu selection
{
case choice_a: // get shirt item inventory
cout << "Enter how many small shirts are left? ";
cin >> number;
shirt.setSmall(number);
cout << "Enter how many medium shirts are left? ";
cin >> number;
shirt.setMedium(number);
cout << "Enter how many large shirts are left? ";
cin >> number;
shirt.setLarge(number);
break;
case choice_b: // get pants item inventory
cout << endl << "Enter how many small pants are left? ";
cin >> number;
pants.setSmall(number);
cout << "Enter how many medium pants are left? ";
cin >> number;
pants.setMedium(number);
cout << "Enter how many large pants are left? ";
cin >> number;
pants.setLarge(number);
break;
case choice_c: // get shoes item inventory
cout << endl << "Enter how many small shoes are left? ";
cin >> number;
shoes.setSmall(number);
cout << "Enter how many medium shoes are left? ";
cin >> number;
shoes.setMedium(number);
cout << "Enter how many large shoes are left? ";
cin >> number;
shoes.setLarge(number);
break;
case quit_choice:
cout << "Program ending.n";
cin.get(); cin.get();
return 0;
break;
default:
cout << "The valid choices are A through D. Run then"
<< "program again and select one of those.n";
cin.get(); cin.get();
return 0;
}
//being displaying inventory results
cout << endl << "n*******************";
cout << endl << "*Inventory results*";
cout << endl << "*******************" << endl;
//displays shirt results
if (shirt.getSmall() < 5)
cout << endl << "There are " << shirt.getSmall() << " small shirts left. ORDER MORE!" << endl;
else
cout << endl << "There are " << shirt.getSmall() << " small shirts left." << endl;
if (shirt.getMedium() < 5)
cout << "There are " << shirt.getMedium() << " medium shirts left. ORDER MORE!" << endl;
else
cout << "There are " << shirt.getMedium() << " medium shirts left." << endl;
if (shirt.getLarge() < 5)
cout << "There are " << shirt.getLarge() << " large shirts left. ORDER MORE!" << endl;
else
cout << "There are " << shirt.getLarge() << " large shirts left." << endl;
cout << "There are a total of " << shirt.allRem() << " shirts left." << endl;
// displays pant results
if (pants.getSmall() < 5)
cout << endl << "There are " << pants.getSmall() << " small pants left. ORDER MORE!" << endl;
else
cout << endl << "There are " << pants.getSmall() << " small pants left." << endl;
if (pants.getMedium() < 5)
cout << "There are " << pants.getMedium() << " medium pants left. ORDER MORE!" << endl;
else
cout << "There are " << pants.getMedium() << " medium pants left." << endl;
if (pants.getLarge() < 5)
cout << "There are " << pants.getLarge() << " large pants left. ORDER MORE!" << endl;
else
cout << "There are " << pants.getLarge() << " large pants left." << endl;
cout << "There are a total of " << pants.allRem() << " pants left." << endl;
// displays shoe results
if (shoes.getSmall() < 5)
cout << endl << "There are " << shoes.getSmall() << " small shoes left. ORDER MORE!" << endl;
else
cout << endl << "There are " << shoes.getSmall() << " small shoes left." << endl;
if (shoes.getMedium() < 5)
cout << "There are " << shoes.getMedium() << " medium shoes left. ORDER MORE!" << endl;
else
cout << "There are " << shoes.getMedium() << " medium shoes left." << endl;
if (shoes.getLarge() < 5)
cout << "There are " << shoes.getLarge() << " large shoes left. ORDER MORE!" << endl;
else
cout << "There are " << shoes.getLarge() << " large shoes left." << endl;
cout << "There are a total of " << shoes.allRem() << " shoes left." << endl;
cin.get(); cin.get();
return 0;
}
cin.get(); cin.get();
return 0;
}
PS：在没有切换的情况下，我让程序成功地遍历了每个项目，并显示了所有结果，没有任何"垃圾"结果。垃圾结果只在我完成切换后出现，因为输入只占一个项目。
PSS：我还尝试了一个do-white循环来封装交换机外壳，但它没有按预期工作。我对不同类型的解决方案持开放态度，它不必最终成为切换案例，尽管如果有一种简单的方法来合并切换案例，那就更好了。谢谢！
编辑：这是没有切换案例或菜单的干净代码
//Name: Abdul Tabel
//Inventory program
#include <iostream>
#include <iomanip>
#include <string>
#include <cstring>
#include <fstream>
#include <cstdlib>
using namespace std;
// clothing item class declaration
class Item
{
private:
double small;
double medium;
double large;
public:
void setSmall(double);
void setMedium(double);
void setLarge(double);
double getRem() const;
double getSmall() const;
double getMedium() const;
double getLarge() const;
double allRem() const;
};
//menu function
void showMenu()
{
cout << "Please enter the items remaining for the following items" << endl;
}
//assign value to small item
void Item::setSmall(double null)
{
small = null;
}
//assign value to medium item
void Item::setMedium(double null)
{
medium = null;
}
//assign value to large item
void Item::setLarge(double null)
{
large = null;
}
//gets value from small variable
double Item::getSmall() const
{
return small;
}
//gets value from medium variable
double Item::getMedium() const
{
return medium;
}
//gets value from large variable
double Item::getLarge() const
{
return large;
}
//gets total of reamining items
double Item::allRem() const
{
return small + medium + large;
}
int main()
{
Item shirt;
Item pants;
Item shoes;
double number;
double totalRemaining;
char selection;
// set output format
cout << fixed << showpoint << setprecision(2);
//show menu
showMenu();
cout << "Enter how many small shirts are left? ";
cin >> number;
shirt.setSmall(number);
cout << "Enter how many medium shirts are left? ";
cin >> number;
shirt.setMedium(number);
cout << "Enter how many large shirts are left? ";
cin >> number;
shirt.setLarge(number);
cout << endl << "Enter how many small pants are left? ";
cin >> number;
pants.setSmall(number);
cout << "Enter how many medium pants are left? ";
cin >> number;
pants.setMedium(number);
cout << "Enter how many large pants are left? ";
cin >> number;
pants.setLarge(number);
cout << endl << "Enter how many small shoes are left? ";
cin >> number;
shoes.setSmall(number);
cout << "Enter how many medium shoes are left? ";
cin >> number;
shoes.setMedium(number);
cout << "Enter how many large shoes are left? ";
cin >> number;
shoes.setLarge(number);
//being displaying inventory results
cout << endl << "n*******************";
cout << endl << "*Inventory results*";
cout << endl << "*******************" << endl;
//displays shirt results
if (shirt.getSmall() < 5)
cout << endl << "There are " << shirt.getSmall() << " small shirts left. ORDER MORE!" << endl;
else
cout << endl << "There are " << shirt.getSmall() << " small shirts left." << endl;
if (shirt.getMedium() < 5)
cout << "There are " << shirt.getMedium() << " medium shirts left. ORDER MORE!" << endl;
else
cout << "There are " << shirt.getMedium() << " medium shirts left." << endl;
if (shirt.getLarge() < 5)
cout << "There are " << shirt.getLarge() << " large shirts left. ORDER MORE!" << endl;
else
cout << "There are " << shirt.getLarge() << " large shirts left." << endl;
cout << "There are a total of " << shirt.allRem() << " shirts left." << endl;
// displays pant results
if (pants.getSmall() < 5)
cout << endl << "There are " << pants.getSmall() << " small pants left. ORDER MORE!" << endl;
else
cout << endl << "There are " << pants.getSmall() << " small pants left." << endl;
if (pants.getMedium() < 5)
cout << "There are " << pants.getMedium() << " medium pants left. ORDER MORE!" << endl;
else
cout << "There are " << pants.getMedium() << " medium pants left." << endl;
if (pants.getLarge() < 5)
cout << "There are " << pants.getLarge() << " large pants left. ORDER MORE!" << endl;
else
cout << "There are " << pants.getLarge() << " large pants left." << endl;
cout << "There are a total of " << pants.allRem() << " pants left." << endl;
// displays shoe results
if (shoes.getSmall() < 5)
cout << endl << "There are " << shoes.getSmall() << " small shoes left. ORDER MORE!" << endl;
else
cout << endl << "There are " << shoes.getSmall() << " small shoes left." << endl;
if (shoes.getMedium() < 5)
cout << "There are " << shoes.getMedium() << " medium shoes left. ORDER MORE!" << endl;
else
cout << "There are " << shoes.getMedium() << " medium shoes left." << endl;
if (shoes.getLarge() < 5)
cout << "There are " << shoes.getLarge() << " large shoes left. ORDER MORE!" << endl;
else
cout << "There are " << shoes.getLarge() << " large shoes left." << endl;
cout << "There are a total of " << shoes.allRem() << " shoes left." << endl;
cin.get(); cin.get();
return 0;
}
我在底部贴出了自己问题的答案。我放弃了菜单的想法，选择了其他东西。如何将此问题标记为已解决？感谢所有的帮助！
- 您的代码中存在复制粘贴错误
- 在问题描述中，你说"我为程序添加了一个菜单，让员工能够选择他们想要盘点的项目。我希望这个菜单一直显示，直到所有的选择（项目）都被考虑在内"
那么，如果他们必须在显示结果之前选择所有项目，那么让他们选择他们想要进行库存的项目有什么意义呢
我建议你取下开关盒，把"衬衫"、"裤子"answers"鞋子"一一放好。不需要开关箱
我放弃了整个菜单的想法，添加了不同的循环和方法来延长代码。我添加了一个类，它为丢失的库存项目生成要下的订单。这是我完成的最后一个项目。谢谢你的帮助！
//Name: Abdul Tabel
//Inventory program
#include <iostream>
#include <iomanip>
#include <string>
#include <cstring>
#include <fstream>
#include <cstdlib>
#include <array>
#include <list>
using namespace std;
// clothing item class declaration
class Item
{
private:
double small;
double medium;
double large;
string description;
public:
void setDescription(string);
void setSmall(double);
void setMedium(double);
void setLarge(double);
string getDescription() const;
double getRem() const;
double getSmall() const;
double getMedium() const;
double getLarge() const;
double allRem() const;
bool orderMore(int);
/*Item();*/
};
class Order
{
private:
string description;
string size;
double qty;
int OrderNumber;
public:
void setDescription(string);
void setSize(string);
void setQty(double);
void setOrderNumber();
string getDescription() const;
string getSize() const;
double getQty() const;
int getOrderNumber() const;
};
//methods for Order class
string Order::getDescription() const
{
return description;
}
string Order::getSize() const
{
return size;
}
double Order::getQty() const
{
return qty;
}
int Order::getOrderNumber() const
{
return OrderNumber;
}
void Order::setDescription(string x)
{
description = x;
}
void Order::setSize(string x)
{
size = x;
}
void Order::setQty(double x)
{
qty = x;
}
void Order::setOrderNumber()
{
OrderNumber = (rand() % 900) + 100;
}
bool Item::orderMore(int Count)
{
bool returnValue = false;
if (Count < 5)
{
returnValue = true;
}
return returnValue;
}
//menu function
void showMenu()
{
cout << "Please enter the items remaining for the following items" << endl;
}
//assign value to small item
void Item::setDescription(string x)
{
description = x;
}
//assign value to small item
void Item::setSmall(double number)
{
small = number;
}
//assign value to medium item
void Item::setMedium(double number)
{
medium = number;
}
//assign value to large item
void Item::setLarge(double number)
{
large = number;
}
string Item::getDescription() const
{
return description;
}
//gets value from small variable
double Item::getSmall() const
{
return small;
}
//gets value from medium variable
double Item::getMedium() const
{
return medium;
}
//gets value from large variable
double Item::getLarge() const
{
return large;
}
//gets total of reamining items
double Item::allRem() const
{
return small + medium + large;
}
int main()
{
double number;
std::array <string,4> itemType = {"shirts", "pants", "shoes", "coats"};
//dynamic allocation of array size
Item *items;
items = new Item[itemType.size()];
//for loop will iterate through all items in array
showMenu();
for(int i=0; i < itemType.size(); i++)
{
items[i].setDescription(itemType[i]);
cout << "Enter how many small " + itemType[i] + " are left? ";
cin >> number;
items[i].setSmall(number);
cout << "Enter how many medium " + itemType[i] + " are left? ";
cin >> number;
items[i].setMedium(number);
cout << "Enter how many large " + itemType[i] + " are left? ";
cin >> number;
items[i].setLarge(number);
}
//being displaying inventory results
cout << endl << "n*******************";
cout << endl << "*Inventory results*";
cout << endl << "*******************" << endl;
// dynamically creates a list for the unknown orders
list<Order> orders;
// Output the quantitis entered back to the user and create orders for the ones that need orders.
for(int i=0; i < itemType.size(); i++)
{
cout << endl << "There are " << items[i].getSmall() << " small " << items[i].getDescription() << " left. ";
if (items[i].orderMore(items[i].getSmall()))
{
cout << " Automatically creating order for this product";
Order m;
m.setDescription(items[i].getDescription());
m.setQty(5-items[i].getSmall());
m.setSize("small");
m.setOrderNumber();
orders.push_front(m);
}
cout << endl << "There are " << items[i].getMedium() << " medium " << items[i].getDescription() << " left.";
if (items[i].orderMore(items[i].getMedium()))
{
cout << " Automatically creating order for this product";
Order m;
m.setDescription(items[i].getDescription());
m.setQty(5-items[i].getMedium());
m.setSize("medium");
m.setOrderNumber();
orders.push_front(m);
}
cout << endl << "There are " << items[i].getLarge() << " large " << items[i].getDescription() << " left.";
if (items[i].orderMore(items[i].getLarge()))
{
cout << " Automatically creating order for this product";
Order m;
m.setDescription(items[i].getDescription());
m.setQty(5-items[i].getLarge());
m.setSize("large");
m.setOrderNumber();
orders.push_front(m);
}
cout << endl << "There are " << items[i].allRem() << " total " << items[i].getDescription() << " left." << endl;
}
cout << endl << "n*******************";
cout << endl << "* Order results *";
cout << endl << "*******************" << endl;
list<Order>::iterator iter; //iterator is used to iterate through all objects in the list
// loop for orders
for (iter = orders.begin(); iter != orders.end(); iter++)
{
cout << endl << "Order placed for " << iter->getQty() << " " << iter->getSize() << " " << iter->getDescription() << " on order number: " << iter->getOrderNumber();
}
cin.get(); cin.get();
return 0;
}
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