Output a string thats assigned to an element in a double Array in C++

Question

Hey I have a pretty simple question to be answered. I assigned elements of my array to string values. I want my code to output the string instead of the element value. Here is an example:

double stock[5] = {249.99,49.99,13.99,449.99,59.99}; double Beats = stock[0]; double iPod = stock[1]; std::cout << "Okay, you purchased " << stock[0] << endl;

The output I would like is "Okay, you purchased Beats." . The output I recieve is "Okay, you purchased 249.99."

How can I make it print the string instead of the value? Thank you in advance.

Mike is asking for Beats or iPod, it looks like that is what he wants to print in his code example, this isn't a string, he wants the name of the variable. — FiringSquadWitness, Jul 14 '15 at 03:18
Where are your strings? Are you referring to the variable names `Beats` and `iPod`? — wilcroft, Jul 14 '15 at 03:19
No. That would lose their ability to store stock[0]. What you want is an object that can store both. ie. item Beats = new item("Beats", stock[0]); Then you can call std::cout << "Okay, you purchased " << Beats.name << endl; or something. — FiringSquadWitness, Jul 14 '15 at 03:20

score 3 · Accepted Answer · answered Jul 14 '15 at 03:27

You'll likely want some kind of container, be it a struct, class or pair. Here's an example (using a pair):

#include <utility>
#include <string>

...

std::pair <std::string,double> stock [5];
stock[0]=std::make_pair("Beats",249.99);

...

std::cout << "Okay, you purchased " << stock[0].first << "." << endl;

This will output what you want ("Okay, you purchased Beats.").

You can use stock[i].first to access the first element (the name, as a string), and stock[i].second to access the second element (the value, as a double).

score 1 · Answer 2 · answered Jul 14 '15 at 03:27

1

string items[5] = {"Beats", "iPod", "CD", "Vinyl", "Sheet"};
std::cout << "Okay, you purchased " << items[0] << endl;

If you want to maintain the numbers (i.e stock) also, you need something a little more sophisticated.

answered Jul 14 '15 at 03:27

Beta

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score -1 · Answer 3 · answered Jul 14 '15 at 03:38

I assume you need to display what item has been purchased and at what price. If so, may be you need something like following.

#include <iostream>
using namespace std;

struct item_struct
{
    std::string item;
    double price;
    item_struct(string _item, double _price)
    {
        item = _item;
        price = _price;
    }
};

int main() {

    item_struct *stock[5] = {new item_struct("Beats", 249.99),
                                new item_struct("iPod", 49.99),
                                new item_struct("CD", 13.99),
                                new item_struct("iPone", 899.99),
                                new item_struct("Nexus 5", 499.99)
                                };

    std::cout << "Okay, you purchased " << stock[0]->item << endl;

    std::cout << "Okay, you purchased " << stock[3]->item
                << " at the price of " << stock[3]->price
                << endl;

    return 0;
}

Result:

Okay, you purchased Beats
Okay, you purchased iPone at the price of 899.99

Output a string thats assigned to an element in a double Array in C++

3 Answers3