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POno matching function call to a constructor
 

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    <pre><code>#include &lt;iostream&gt; using namespace std; template&lt;class T&gt; class people{ public: virtual void insert(T item)=0; virtual T show()=0; }; class name { private: string fname; string lname; public: name(string first, string last); // bool operator== (name &amp; p1, name &amp;p2) }; name::name(string first, string last){ fname = first; lname = last; } template &lt;class T&gt; class person : public people&lt;T&gt; { private: T a[1]; int size; public: person(); virtual void insert(T info); virtual T show(); }; template&lt;class T&gt; person&lt;T&gt;::person(){ size = 0; } template&lt;class T&gt; void person&lt;T&gt;::insert(T info){ a[0] =info; } template &lt;class T&gt; T person&lt;T&gt;::show(){ return a[0]; } int main(){ string first("Julia"), last("Robert"); name temp(first,last); people&lt;name&gt;* aPerson = new person&lt;name&gt;(); aPerson-&gt; insert(temp); cout &lt;&lt; aPerson-&gt;show() &lt;&lt; endl; return 0; } </code></pre> <p>These are the errors I'm getting:</p> <pre class="lang-none prettyprint-override"><code>test.cpp: In function 'int main()': test.cpp:53: error: no match for 'operator&lt;&lt;' in 'std::cout &lt;&lt; people&lt;T&gt;::show [with T = name]()' test.cpp: In constructor 'person&lt;T&gt;::person() [with T = name]': test.cpp:51: instantiated from here test.cpp:37: error: no matching function for call to 'name::name()' test.cpp:21: note: candidates are: name::name(std::string, std::string) test.cpp:12: note: name::name(const name&amp;) </code></pre>
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    1. COYou have no appropriate default constructor for class `name` obviously! Just read what the compiler tells you ...
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    2. COYou should get a good tutorial on [c++-metaprogramming](http://en.wikipedia.org/wiki/Template_metaprogramming), instead of getting through [question wise](http://stackoverflow.com/questions/19877896/c-type-value-mismatch-at-argument-1-in-template-parameter-list) here ...
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    3. COBy the way, you should include the `<string>` header explicitly. There's no guarantee that [`<iostream>`](http://en.cppreference.com/w/cpp/header/iostream) will include [`<string>`](http://en.cppreference.com/w/cpp/header/string).
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