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squall1986

Jul 4th, 2009 3:16 am

Help with a vector<vector<string> *>

Hi, for a class, I'm trying to implement a separate-chaining hash table stored in a vector that contains pointers to vectors where the keys will be stored. This is basically what I have:

    typedef vector<string> KeyChain;

    vector<KeyChain *> Table;

The problem I'm having is when I want to access the keys in the KeyChain, I don't know how to get to those values, this is what I've tried:

    Table[value][index]

    Table[value]->[index]

What is the syntax for accessing the items in a vector that is referenced with a pointer in another vector? Thank you for your help!

adatapost

Jul 4th, 2009 4:02 am

Re: Help with a vector<vector<string> *>

Welcome squall1986,

Use may use :

(*(Table[index]))[index];

squall1986

Jul 5th, 2009 5:52 am

Re: Help with a vector<vector<string> *>

Quote:

Originally Posted by adatapost (Post 908045)

Welcome squall1986,

Use may use :

(*(Table[index]))[index];

Thank you, that works, but I also asked my instructor about it, and he told me that he wanted us to do something along these lines:

        vector<string> *Table;

        Table = new vector<string>[size];

So I'll be doing that, but thanks for the help!

adatapost

Jul 5th, 2009 6:03 am

Re: Help with a vector<vector<string> *>

So, where is a problem?

  vector<string> *Table;

  Table = new vector<string>[2];



  Table[0].push_back("Aaa");

  Table[0].push_back("Bbb");

  Table[0].push_back("Ccc");

    

  Table[1].push_back("Ppp");

  Table[1].push_back("Qqq");

 

cout << "\n" << Table[0][0];

cout << "\n" << Table[0][1];

cout << "\n" << Table[0][2];

cout << "\n" << Table[1][0];

cout << "\n" << Table[1][1];

Table[0][0]="AAAAAA";

....

squall1986

Jul 5th, 2009 1:08 pm

Re: Help with a vector<vector<string> *>

Quote:

Originally Posted by adatapost (Post 908717)

So, where is a problem?

Umm ... I don't think there is a problem now, it's working fine for me. Are you asking me that because you see one and you want me to look for it ... ?

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