Thread: Inserting struct data into a vector?

Code:

struct data {
  string name;
  string title;
  string author;
};

vector <data> books;

Say that you have an x ammount of names, decided by the user, that needs to be put inside the vector. How do you do that in the example provided using a for loop (where i < x)?

Originally Posted by anon

You may take a look at this to see what you can do with a vector, in particular push_back.

So how would that be in the example provided?

Code:

data tmp;

tmp.name = "name";
tmp.title= "title";
tmp.author= "author";

books.push_back( tmp );

Originally Posted by EOP

Code:

data tmp;

tmp.name = "name";
tmp.title= "title";
tmp.author= "author";

books.push_back( tmp );

Thanks!
How do you later access a certain name, title, or an author if you want to cout it?

If you like an ID to be associated with "tmp", what would be a clever way to do so?

Originally Posted by Glauber

Thanks!
How do you later access a certain name, title, or an author if you want to cout it?

If you like an ID to be associated with "tmp", what would be a clever way to do so?

Download the book at this link: http://www.mindview.net/Books/TICPP/...ngInCPP2e.html

You're asking basic questions without making even a modest effort to learn on your own.

Originally Posted by Glauber

Thanks!
How do you later access a certain name, title, or an author if you want to cout it?

Vectors can work the same as an array.
cout << tmp[0].name << tmp[0].title << tmp[0].author;

Originally Posted by Glauber

If you like an ID to be associated with "tmp", what would be a clever way to do so?

Then I believe what you want is a map<ID, data> instead of a vector<data>

Originally Posted by cpjust

Vectors can work the same as an array.
cout << tmp[0].name << tmp[0].title << tmp[0].author;


Then I believe what you want is a map<ID, data> instead of a vector<data>

Yes probobly, so how would you create it as you suggest? Would the ID be a var bound to the data? How would it work?

Originally Posted by Elysia

http://cboard.cprogramming.com/showp...4&postcount=14

Could you in words describe what that does, each symbol and all?

Originally Posted by Elysia

Certainly.
First define a map. It is a template that takes two template types: the key and the value.
The key is the type that you will use with the find function to find the data you specified with value.
So in essence, you will search using an integer (id) to find a struct named "player".
Next line is an example of how to insert something into the map.
You use the index operator and inside, specify your id that you want to associate your value with. Then I use assignment to assign the value I want to be associated with that key.
The third line uses the find function to find that specific value associated with that id. std::map::find returns an iterator. The iterator is always of the type of the type of your map::iterator. So that means std::map<int, player>::iterator is the type.
After assigning it, must must check if it's NOT equal to std::map::end() because the function will return std::map::end() (which is an iterator) if it fails.
Considering it succeeds, accessing the property i->second finds the value associated with that id.

Explenation appreciated. If you got the will, could you explain what good typing "std::" before something does, and when you use it?
And what exactly does "->" do?