Question

I need help in my C++ code regarding outputting the enums in string chars. I created a switch statement for the enums in order to output words instead of their respective enumerated values, but an error came up regarding a "cout" operator on my "Type of Item" line in my ranged-based for loop near the bottom of the code. I tried casting "i.type" to both "i.GroceryItem::Section::type" and "i.Section::type", but neither worked. Simply put, if a user inputs 1 as their "choice" for the type of item when the program runs, I want to output that value as "produce", not as 0 according to how my enum was constructed. My C++ code is below:

#include <iostream>
#include <vector>
using namespace std;

struct Location {
   int aisle;
   int section;
   int shelf;
};

struct GroceryItem {
   enum class Section { produce, dairy, meat, canned_goods, frozen, bakery, drinks };
   Section type;
   float price;
   int quantity;
   string name;
   Location location;
};

int main() {
   vector<GroceryItem>store;
   char decision{ 'y' };
   while (!(decision == 'N' || decision == 'n')) {
       cout << "Do you have a grocery item to add to your list? (y)es or (n)o" << endl;
       cin >> decision;

       if (decision == 'Y' || decision == 'y') {
           store.push_back(GroceryItem());

           cout << "What is the name of your item?" << endl;
           cin >> store.back().name;

           cout << "What is the price of your item" << endl;
           cin >> store.back().price;

           cout << "How many of that item do you have?" << endl;
           cin >> store.back().quantity;

           cout << "What aisle, section, and shelf is this item located at?" << endl;
           cin >> store.back().location.aisle >> store.back().location.section >> store.back().location.shelf;

           cout << "What type of food is this?" << endl;
           cout << "\n1. produce" << "\n2. dairy" << "\n3. meat" << "\n4. canned goods" << "\n5. frozen"
               << "\n6. bakery" << "\n7. drinks" << endl;
           int choice;
           cin >> choice;

           if (choice == 1) {
               store.back().type = GroceryItem::Section::produce;
           }
           else if (choice == 2) {
               store.back().type = GroceryItem::Section::dairy;
           }
           else if (choice == 3) {
               store.back().type = GroceryItem::Section::meat;
           }
           else if (choice == 4) {
               store.back().type = GroceryItem::Section::canned_goods;
           }
           else if (choice == 5) {
               store.back().type = GroceryItem::Section::frozen;
           }
           else if (choice == 6) {
               store.back().type = GroceryItem::Section::bakery;
           }
           else if (choice == 7) {
               store.back().type = GroceryItem::Section::drinks;
            }
          

            enum class Section { produce, dairy, meat, canned_goods, frozen, bakery, drinks };
           Section type;
           switch (type) {
           case Section::produce:
               cout << "Produce" << endl;
               break;

           case Section::dairy:
               cout << "Dairy" << endl;
               break;

           case Section::meat:
               cout << "Meat" << endl;
               break;

           case Section::canned_goods:
               cout << "Canned Goods" << endl;
               break;

           case Section::frozen:
               cout << "Frozen" << endl;
               break;

           case Section::bakery:
               cout << "Bakery" << endl;
               break;

           default:
               cout << "Drinks" << endl;
           }
       }
   }
       for (auto i: store){
       cout << "Item name: " << i.name << endl;
       cout << "Price of item: " << i.price << endl;
       cout << "Quantity of item: " << i.quantity << endl;
       cout << "Type of item: " << i.type << endl; /* Here is where the error shows up*/
       cout << "Aisle number: " << i.location.aisle << endl;
       cout << "Section number: " << i.location.section << endl;
       cout << "Shelf number: " << i.location.shelf << endl;
       cout << endl;
   }

   return 0;

}

Answer 1

Here is the completed code for this problem. I just implemented a method called to_string that accepts a Section object as parameter and returns the string representation of that enum. And then updated the line containing error to call this method instead. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. If not, PLEASE let me know before you rate, I’ll help you fix whatever issues. Thanks

#include <iostream>

#include <vector>

using namespace std;

struct Location {

   int aisle;

   int section;

   int shelf;

};

struct GroceryItem {

   enum class Section { produce, dairy, meat, canned_goods, frozen, bakery, drinks };

   Section type;

   float price;

   int quantity;

   string name;

   Location location;

};

//method accepting a GroceryItem::Section object as argument, returns the

//type as a string.

string to_string(GroceryItem::Section type){

                switch (type) {

           case GroceryItem::Section::produce:

               return "Produce";

           case GroceryItem::Section::dairy:

               return "Dairy";

           case GroceryItem::Section::meat:

               return "Meat";

           case GroceryItem::Section::canned_goods:

               return "Canned Goods";

           case GroceryItem::Section::frozen:

               return "Frozen";

           case GroceryItem::Section::bakery:

               return "Bakery";

           default:

               return "Drinks";

           }

}

int main() {

   vector<GroceryItem>store;

   char decision{ 'y' };

   while (!(decision == 'N' || decision == 'n')) {

       cout << "Do you have a grocery item to add to your list? (y)es or (n)o" << endl;

       cin >> decision;

       if (decision == 'Y' || decision == 'y') {

           store.push_back(GroceryItem());

           cout << "What is the name of your item?" << endl;

           cin >> store.back().name;

           cout << "What is the price of your item" << endl;

           cin >> store.back().price;

           cout << "How many of that item do you have?" << endl;

           cin >> store.back().quantity;

           cout << "What aisle, section, and shelf is this item located at?" << endl;

           cin >> store.back().location.aisle >> store.back().location.section >> store.back().location.shelf;

           cout << "What type of food is this?" << endl;

           cout << "\n1. produce" << "\n2. dairy" << "\n3. meat" << "\n4. canned goods" << "\n5. frozen"

               << "\n6. bakery" << "\n7. drinks" << endl;

           int choice;

           cin >> choice;

           if (choice == 1) {

               store.back().type = GroceryItem::Section::produce;

           }

           else if (choice == 2) {

               store.back().type = GroceryItem::Section::dairy;

           }

           else if (choice == 3) {

               store.back().type = GroceryItem::Section::meat;

           }

           else if (choice == 4) {

               store.back().type = GroceryItem::Section::canned_goods;

           }

           else if (choice == 5) {

               store.back().type = GroceryItem::Section::frozen;

           }

           else if (choice == 6) {

               store.back().type = GroceryItem::Section::bakery;

           }

           else if (choice == 7) {

               store.back().type = GroceryItem::Section::drinks;

            }

       }

   }

       for (auto i: store){

       cout << "Item name: " << i.name << endl;

       cout << "Price of item: " << i.price << endl;

       cout << "Quantity of item: " << i.quantity << endl;

       //calling to_string() to convert i.type to a string and printing it.

       cout << "Type of item: " << to_string(i.type) << endl;

     cout << "Aisle number: " << i.location.aisle << endl;

       cout << "Section number: " << i.location.section << endl;

       cout << "Shelf number: " << i.location.shelf << endl;

       cout << endl;

   }

   return 0;

}

/*OUTPUT*/

Do you have a grocery item to add to your list? (y)es or (n)o

y

What is the name of your item?

hamburger

What is the price of your item

2

How many of that item do you have?

5

What aisle, section, and shelf is this item located at?

1 4 3

What type of food is this?

1. produce

2. dairy

3. meat

4. canned goods

5. frozen

6. bakery

7. drinks

3

Do you have a grocery item to add to your list? (y)es or (n)o

n

Item name: hamburger

Price of item: 2

Quantity of item: 5

Type of item: Meat

Aisle number: 1

Section number: 4

Shelf number: 3