从指针向量访问成员函数？ C ++

Question

So, lets say I have a vector, vector<Item*> vItem and an Item class with a member function Item::setValue(); . Lets also say I populated that vector by using vItem.push_back(new Item) .

Now, to access that member function, through the pointer in the vector, would vItem[0]->setValue("key"); . be valid? I assumed it was, however when I cout the member variables using a getValue() function, nothing new is returned, only the default values from my constructor.

Any ideas? I feel like it's a stupid mistake in my logic, but I'm not sure. Any help would be greatly appreciated.

EDITS:

setValue code:

void Item::setValue(string sValue)
{
        m_sValue = sValue;
}

with the private variable:

string m_sValue;

getValue code:

string Item::getValue()
{
    return m_sValue;
}

Simple version of the code:

void func2(vector<Item*>& vItem)
{
    vItem.push_back(new Item);
    vItem[0]->setValue("key");
}

int main(int argc, char * argv[])
{
    vector<Item*> vItem;
    func2(vItem);
    cout << vItem[0]->getValue() << endl;

    return 0;
}    

I should also note: everything compiles just fine (g++ using c++0x standard) however, the setter just doesn't set.

Answer 1

Your getValue returns a void and there's an out-of-place semi-colon after getValue() in your implementation of that method. Change to string Item::getValue(){return m_sValue;}