Write code that allows a user to make a grocery list. The program will also allo

Question

Write code that allows a user to make a grocery list. The program will also allow the user to export the grocery lists to a

comma delimited file that can be read by a spreadsheet program (i.e., CSV file) No classes are needed, just a main function.

The function declarations are:

void DisplayMenu();

void CreateList( map< string, vector<string> >& lists );

void ExportLists( map< string, vector<string> >& lists );

The main program must:

1. Use the DisplayMenu function to display the menu.

2. Prompt the user for a menu choice.

3. Use the CreateList and ExportLists functions to execute the user's choice.

4. Exit if the user chooses to exit.

5. Re-prompt the user for invalid choices.

Explanation / Answer

#include <iostream>

#include <map>

#include <vector>

#include <cstdlib>

#include <fstream>

using namespace std;

void DisplayMenu();

void CreateList( map< string, vector<string> >& lists );

void ExportLists( map< string, vector<string> >& lists );

int main(){

map< string, vector<string> > lists;

while(true){

DisplayMenu();

int i;

cin>>i;

switch(i){

case 1 : CreateList(lists);break;

case 2 : ExportLists(lists);break;

case 3 : exit(0);

}

}

}

void DisplayMenu(){

cout << "1. Create a new grocery list 2. Export grocery lists 3. Quit"<<endl;

}

void CreateList(map< string, vector<string> >& lists ){

string name;

cout << "enter store name : ";

cin>>name;

lists[name];

cout << "enter the list of items in the store ";

string temp;

cin>>temp;

while(temp != "done"){

lists[name].push_back(temp);

cout << "Added item in " << name <<" is : "<<temp<<endl;

cin>>temp;

}

}

void ExportLists( map< string, vector<string> >& lists ){

char output[100];

cout << "Enter the output file name : ";

cin >> output;

ofstream myfile(output,ios::trunc);

myfile << "Grocery Store," << "Item" <<endl;

for (map<string, vector<string> >::iterator it=lists.begin(); it!=lists.end(); ++it){

for (vector<string>::iterator it1 = it->second.begin() ; it1 != it->second.end(); ++it1)

myfile << it->first <<","<<*it1<<endl;

}

myfile.close();

}

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