c++ template question

[p_o_x]

i want to initialize a pointer to a template, but as a java/c# programmer the syntax is throwing me off. i want to be able to write the following in one line of code:


Key<int> k(&otherVariable);
Key<int>* j = &k;
//Key is my designed template

this works, but i'd like to avoid explicitly creating an object just to get a pointer to it. looking for the c++ equivalent of java's:


Key<int> k = new Key<int>(otherVariable);
//where the other variable is already a reference
//k will now point to a Key<int> object

thoughts?
ps, not a professional programmer, if i've missed something here, feel free to explain :)

[slavik]

a template is a template, you can't have a pointer to a template since it is not instantiated ...

what problems are you having with the second code snippet?

[DavidBell]

In second snippet



Key<int> *k = new Key<int>(otherVariable);
// ^ you forgot the star

// don't forget to delete later, no GC in C++


DB

[uljanow]

#include <cstdio>

template <typename T> class key {
public:
key(T _n) { n = _n; }
int n;
};

int main()
{
key<int>* k = new key<int>(4455);
printf("%d\n", k->n);

return 0;
}
You need to provide a constructor which can cast the type of the other variable.