#include <stdio.h>

enum types {
   INT,
   DOUBLE,
   STRING
};

void print(void* var, enum types type) {
   if (type == INT) {
       printf("%d\n", *((int*)var));
   }
   if (type == DOUBLE) {
       printf("%lf\n", *((double*)var));
   }
   if (type == STRING) {
       printf("%s\n", (char*)var);
   }
}

int main() {
   int a = 123;
   double b = 2.67;
   char* c = "wubba lubba dub dub";

   print(&a, INT);
   print(&b, DOUBLE);
   print(c, STRING);

   return 0;
}