Macro style templating

#include <stdio.h>

#define CONCAT_(a,b) a##b
#define CONCAT(a,b) CONCAT_(a,b)

#define TO_STRING_(a) #a
#define TO_STRING(a) TO_STRING_(a)

#define VAR_FILE "implementation_file.cpp" // file to be included by all number types
#include "number_types.cpp" // number types
#undef VAR_FILE


int main()
{
    test(32);
    test(32.0f);
    test(32.0);
    return 0;
}