Class/Struct in a Vector...

I'm trying to put a struct or a class into a vector... it seems to work alright but I would like to know how to use functions/variables from the class.

Code:

---

struct test
{
        int aaa;
};

int main()
{
        vector<test> vec;
        test str;
        str.aaa=12;
        vec.push_back(str);
        cout<<vec[vec.size()].aaa;
}

---

This attempt compiles but comes up with 6 digit numbers when I expect it to be 12. So how do you put a class into a vector and retrieve the information?

Thanks

The problem is that vec[vec.size()] accesses an element that does not exist (it is one past the last element in the array).

What you really want to write is:

Code:

---

cout << vec[0].aaa;

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Or if you want the most recently pushed element:

Code:

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cout << vec.back().aaa;

---

Code:

---

    cout<<vec.size() << endl;
    cout<<vec[vec.size()-1].aaa << endl;

---

Just like arrays, subscripts start at 0.

Ah! Thankyou both alot!