Question

Write in c++ please

Imagine you are writing a program to manage a shopping list. Each shopping list item is represented by a string stored in a container. Your design requires a print function that prints out the contents of the shopping list Using a vector to hold the shopping list items, write a print function to print out the contents of a vector of strings. Test your print function with a main program that does the following: 1. Create an empty vector. Prove it is empty, then print it. 2. Append the items, "eggs," "milk," "sugar," "chocolate," and "flour" to the list. Print it 3. Remove the last element from the vector. Print it 4. Append the item, "coffee" to the vector. Print it. 5. Search for the item, "sugar" and replace it with "honey." Print the vector. 6. Search for the item, "milk," and then remove the vector from the vector. (You are permitted to reorder the vector to accomplish the removal, if you want.) Print 7. (Optional) Search for the item, "milk" and find a way to remove it without changing the order of the rest of the vector. (This is not necessarily an efficient operation.) Print the vector 8. Clear the vector. Prove it is empty, then print it

Answer 1

Below is the complete code as per the requirements. It is well explained inside the code using comments.

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

// prints the vector
void print(vector<string> shoppingList)
{
   cout << endl;
   for (vector<string>::const_iterator i = shoppingList.begin(); i != shoppingList.end(); ++i)
   {
       cout << *i << " ";
   }
   cout << endl;
}

// main function
int main()
{
   // create a vector of string
   vector<string> shoppingList;

   // print is it is empty
   if (shoppingList.empty())
   {
       cout << "Shopping List is empty" << endl;
   }

   // append items
   cout << endl << "Adding Items. . ." << endl;
   shoppingList.push_back("eggs");
   shoppingList.push_back("milk");
   shoppingList.push_back("sugar");
   shoppingList.push_back("chocolate");
   shoppingList.push_back("flour");
   cout << "Items added." << endl;

   // print the list
   print(shoppingList);
  

   // remove last element from vector and print it
   shoppingList.pop_back();
   cout << "Last element removed." << endl;
   print(shoppingList);

   // append "coffee" and print it
   shoppingList.push_back("coffee");
   cout << "Coffee added." << endl;
   print(shoppingList);

   // search for "sugar" and replace it with "honey"
   vector<string>::iterator it = find(shoppingList.begin(), shoppingList.end(), "sugar");
   int pos = distance(shoppingList.begin(), it);
   shoppingList.at(pos) = "honey";
   cout << "sugar replaced with honey" << endl;
   print(shoppingList);

   // clear the vector
   shoppingList.clear();
   cout << "Shopping list cleared." << endl;

   // print is it is empty
   if (shoppingList.empty())
   {
       cout << "Shopping List is empty" << endl;
   }

   return 0;
}

Below is the sample output:

Shopping List is empty Adding Items. Items added. eggs milk sugar chocolate flour Last element removed. eggs milk sugar chocolate Coffee added. eggs milk sugar chocolate coffee sugar replaced with honey eggs milk honey chocolate coffee Shopping list cleared. Shopping List is empty

This completes the requirement. Let me know if you have any queries.

Thanks!