Question

1. in this programe i want add some products to be shown after choosing choise ( show all products ) before i add any products. let say 10 products have added to the program then when the user choose (show all products ) all the 10 products appear and the user going to choose one and that one must has its own name, price,and quantity after that the quantity will be reduce.

2. allow the user to buy products.

===========================================================

#include <iostream>

#include <string>

#include <iomanip>

using namespace std;

struct product

{

string name;

int quantity;

float price;

};

void show_products(product products[])

{

if (products[0].name.empty())

{

cout << "\nYou have not added any product yet." << endl;

return;

}

cout << "\n\nAll Products";

cout << "\n--------------------------------------------------------------------------------\n";

cout << left << setw(18) << "Product Number"

<< left << setw(30) << "Name"

<< left << setw(15) << "Quantity"

<< left << setw(15) << "Unit Price";

cout << "\n--------------------------------------------------------------------------------\n";

for (int i = 0; i < 30; i++)

{

if (products[i].name.empty())

break;

cout << left << setw(18) << i + 1

<< left << setw(30) << products[i].name

<< left << setw(15) << products[i].quantity

<< left << setw(15) << products[i].price << "\n";

}

cout << "--------------------------------------------------------------------------------\n";

}

int main()

{

int x, choice, i = 0;

product products[30];

do

{

cout << "\n1. Add products" << endl

<< "2. Show all products" << endl

<< "3. Update a product" << endl

<< "4. Delete a product" << endl

<< "5. Exit" << endl

<< "Enter your choice: ";

cin >> choice;

switch (choice)

{

case 1:

cout << "Enter product name: ";

cin >> ws; // Clean whitespaces

getline(cin, products[i].name);

cout << "Enter product quantity: ";

cin >> products[i].quantity;

cout << "Enter unit price: ";

cin >> products[i].price;

i++;

break;

case 2:

show_products(products);

break;

case 3:

cout << "Enter product number: ";

cin >> x;

cout << "Enter product name: ";

cin >> ws; // Clean whitespaces

getline(cin, products[x - 1].name);

cout << "Enter product quantity: ";

cin >> products[x - 1].quantity;

cout << "Enter unit price: ";

cin >> products[x - 1].price;

break;

case 4:

cout << "Enter product number: ";

cin >> x;

for (int y = x; y < 30; y++)

{

cout << "Product Name: " << products[y - 1].name << endl;

if (products[y].name.empty())

{

products[y - 1].name = "";

break;

}

products[y - 1] = products[y];

}

break;

case 5:

break;

default:

cout << "-----------------------------------------"<<endl;

cout << "You have not chosen any choice yet"<< endl;

cout << "Enter any key to return to the main menu "<<endl;

cin >> ws;

break;

}

} while (choice != 5);

return 0;

}

Answer 1

/*  C++ Language Used  */
/* Product Management Program */
/* Update Functionality Added */
//File Inclusion
#include <iostream>
#include <string>
#include <iomanip>

using namespace std;

//struture to to store product details
struct product
{

   string name;
   
   int quantity;
   
   float price;

};

//Function to show prduct details
void show_products(product products[])
{

   //Checking is product is not empty
   if (products[0].name.empty())
   {
      cout << "\nYou have not added any product yet." << endl;
      return;
   }

   //Displaying Formated Messages
   cout << "\n\nAll Products";
   cout << "\n--------------------------------------------------------------------------------\n";
   cout << left << setw(18) << "Product Number"
   << left << setw(30) << "Name"
   << left << setw(15) << "Quantity"
   << left << setw(15) << "Unit Price";
   cout << "\n--------------------------------------------------------------------------------\n";
   
   //Displaying Product Description
   for (int i = 0; i < 30; i++)
   {
      if (products[i].name.empty())
         break;
         cout << left << setw(18) << i + 1
         << left << setw(30) << products[i].name
         << left << setw(15) << products[i].quantity
         << left << setw(15) << products[i].price << "\n";
   }
   cout << "--------------------------------------------------------------------------------\n";
}

//Driver Function
int main()
{
   //Data Variable
   int x, choice, i = 0;
   //Initialising First few object as hardcode    
   product products[30] = {
                     {"Laptop", 10, 2200},
                     {"HandPhone", 10, 1200},
                     {"Desktop", 10, 4000},
                     {"StudyTable", 10, 250},
                     {"SmartTv", 10, 800}
                     };
   
   /* Do-While Loop
      Iterate until user press 6
   */
   do
   {
      //Displaying Menu
      cout << "\n1. Add products" << endl    
      << "2. Show all products" << endl
      << "3. Update a product" << endl
      << "4. Delete a product" << endl
      << "5. Purchase a product" << endl
      << "6. Exit" << endl
      << "Enter your choice: ";

      //Taking choice       
      cin >> choice;
   
      //Switching for choice
      switch (choice)
      {
         case 1:       //Case for adding products
                  cout<<"\n";
                  cout<<"Current Stock";
                  show_products(products);
                  
                  cout << "\nEnter product name: ";
                  cin >> ws; // Clean whitespaces
                  getline(cin, products[i].name);
                  cout << "Enter product quantity: ";
                  cin >> products[i].quantity;
                  cout << "Enter unit price: ";
                  cin >> products[i].price;
                  i++;
                  break;

         case 2:       //Case for displaying products details
                  show_products(products);
                  break;
         
         case 3:       //Case for update a product
                  cout << "Enter product number: ";
                  cin >> x;
                  cout << "Enter product name: ";
                  cin >> ws; // Clean whitespaces
                  getline(cin, products[x - 1].name);
                  cout << "Enter product quantity: ";
                  cin >> products[x - 1].quantity;
                  cout << "Enter unit price: ";
                  cin >> products[x - 1].price;
                  break;
         
         case 4:       //Case for delete a product
                  cout << "Enter product number: ";
                  cin >> x;
                  for (int y = x; y < 30; y++)
                  {
                     cout << "Product Name: " << products[y - 1].name << endl;
                  
                     if (products[y].name.empty())
                     {
                        products[y - 1].name = "";
                        break;
                     }
                     products[y - 1] = products[y];
                  }
                  
                  break;
                  
         case 5:       //Case for purchase a product
                  cout<<"\n";
                  cout << "Enter product number: ";
                  cin >> x;
                  x = x - 1;
                  
                  //traversing in product array
                  for(int y = 0; y<30; y++)
                  {
                     //checking if entered number is same as prduct number
                     if(x == y)
                     {
                        //Displaying matched product details
                        cout<<"Product Found!";
                        cout<<"\nProduct Name : "<<products[x].name;
                        cout<<"\nProduct Price : "<<products[x].price;
                        cout<<"\nProduct Quantity : "<<products[x].quantity;
                        
                        //Procedure to purchase
                        int quan;
                        mark:
                           //Taking input of quantity
                           cout<<"\n\nEnter Quantity to purchased : ";
                           cin>>quan;
                           
                           //Checking if quantity available
                           if(quan < products[x].quantity)
                           {
                              cout<<"Product Purchased";
                              products[x].quantity = products[x].quantity - quan;
                           }
                           else
                           {
                              cout<<"Quantity Not Available";
                              goto mark;
                           }
                     }
                  }
                  
                  break;

         case 6:
                  break;
         
         default:   //Deafault Message
                  cout << "-----------------------------------------"<<endl;
                  cout << "You have not chosen any choice yet"<< endl;
                  cout << "Enter any key to return to the main menu "<<endl;
                  cin >> ws;
                  break;
         
         }
   
   } while (choice != 6);
   
   return 0;

}
/* Main Function Ends */

Output: