static template functions in a class

Question

How do I make the following function inside a class and then access this function from main? My class is just a collection of a bunch of static functions.

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Answer 1

Define the function in the .h file.

Works fine for me

a.h

#include 
#include 

using namespace std;
class A {
public:
template< typename T>
    static double foo( vector arr );

};

template< typename T>
double A::foo( vector arr ){ cout << arr[0]; }

main.cpp

#include "a.h"
int main(int argc, char *argv[])
{
    A a;
    vector arr;
    arr.push_back(1);
    A::foo ( arr );
}