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POInheriting vector class with different types
 

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  1. POInheriting vector class with different types
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    <p>I am trying to inherit STL vector class to create a new class on my own. It will use vector's base properties but i will add some new functions like sum or divide. The problem here is i am trying to implement that class also for different types. How can i use both inheritance and template at the same time ?</p> <p>Below is my class body where i need some help.</p> <pre><code>//template &lt;class T&gt; ? class NewVector&lt;T&gt; : public vector&lt;T&gt;{ //some constructors }; </code></pre> <p>Yes. Inheriting STL is not a good idea. I am aware of it. But lets say i am using this inheritance.</p> <p>The problem i face here is building constructors.</p> <p>I am calling constructor in main like this,</p> <pre><code>NewVector&lt;int&gt; v1(3); </code></pre> <p>but the problem is i can not create this v1 vector like STL vector does. When i try to debug get 0 for size and 0 for capacity. How will i edit the size and capacity in constructor ? I tried to do those but couldn't manage.</p> <pre><code>template &lt;class T&gt; class NewVector : public vector&lt;T&gt;{ public: NewVector(T n){ const ArithmeticVector&lt;T&gt; &amp;v1(n); cout&lt;&lt;v1.size()&lt;&lt;endl; }; //some constructors }; </code></pre> <p>i see the size of v1 vector 0, but i want to see it 3 as i mentioned. A little help would be nice.</p> <p>Here is the main file. i know i need to write some constructors but they need to work both int and double and also how will i tell my class to do them ?</p> <pre><code>using namespace std; int main() { NewVector&lt;int&gt; v1(3); // creating some objects NewVector&lt;int&gt; v2(3); // vector elements are assigned randomly from 0 to 10 NewVector&lt;double&gt; v3(5); NewVector&lt;double&gt; v4(5); ..... </code></pre>
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    1. USerenkabakci
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    1. COStandard containers are not meant to be derived from
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      1. USAndy Prowl
    2. COIf you want to define new functions for vector then define new functions for vector. You don't need inheritance for this.
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      1. USPubby
    3. COisn't there any ways to do that ? i need to inherit vector class. writing my own vector class must be impossible.
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